Antarctica: Geography and Climate

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Questions and Answers

What is the name of the active volcano found on Ross Island in Antarctica?

  • Mount Erebus (correct)
  • Mount Vesuvius
  • Mount Kilimanjaro
  • Mount Fuji

Approximately how old is Mount Erebus?

  • Ten million years
  • 100,000 years
  • 10,000 years
  • One million years (correct)

What is the primary purpose of the Antarctic Treaty of 1961?

  • To allow countries to claim parts of Antarctica for resource extraction.
  • To promote tourism in Antarctica.
  • To establish permanent human settlements in Antarctica.
  • To protect Antarctica for peaceful research and prevent military activities. (correct)

Which of the following describes Antarctica's status regarding human habitation?

<p>Considered a 'Human Void Zone' due to the lack of permanent settlement. (B)</p> Signup and view all the answers

What adaptation helps penguins survive in Antarctica's cold climate?

<p>Oily feathers and a thick fat layer for insulation. (C)</p> Signup and view all the answers

What date is observed as World Penguin Day?

<p>April 25th (C)</p> Signup and view all the answers

What is the approximate average annual temperature in Antarctica?

<p>-50°C (C)</p> Signup and view all the answers

Which explorer is credited with being the first to reach the South Pole?

<p>Roald Amundsen (A)</p> Signup and view all the answers

In what hemisphere is Antarctica located?

<p>Southern Hemisphere (C)</p> Signup and view all the answers

What type of precipitation mainly occurs in Antarctica?

<p>Snow (B)</p> Signup and view all the answers

Which of these oceans does NOT surround Antarctica?

<p>Arctic Ocean (B)</p> Signup and view all the answers

What is the primary purpose of research stations in Antarctica?

<p>Conduct Scientific Research (D)</p> Signup and view all the answers

What is the name given to the waters of the Atlantic, Pacific, and Indian Oceans beyond the Antarctic Circle?

<p>Southern Ocean (D)</p> Signup and view all the answers

Under the Antarctic Treaty, what is Antarctica primarily designated for?

<p>Peaceful Purposes Only (B)</p> Signup and view all the answers

Which part of Antarctica constitutes only 5% of the continent's total surface area?

<p>West Antarctica (B)</p> Signup and view all the answers

What causes the low rainfall in Antarctica?

<p>Katabatic winds (D)</p> Signup and view all the answers

What is a characteristic of the Antarctic Ice Sheet?

<p>It contains 30 million cubic kilometers of ice (B)</p> Signup and view all the answers

Which of the following describes East Antarctica?

<p>It is also known as Greater Antarctica (A)</p> Signup and view all the answers

Which mountain range separates East and West Antarctica?

<p>Transantarctic Mountains (A)</p> Signup and view all the answers

What is a key feature of West Antarctica?

<p>Thin ice sheet (D)</p> Signup and view all the answers

What is the name of the longest river in Antarctica?

<p>Onyx River (B)</p> Signup and view all the answers

Why is Antarctica so cold?

<p>The angle of the sun is low and it has long periods of darkness (B)</p> Signup and view all the answers

What does the term 'albedo' refer to in the context of Antarctica?

<p>The amount of energy reflected back into space (D)</p> Signup and view all the answers

Which of these seas surrounds Antarctica?

<p>Ross Sea (B)</p> Signup and view all the answers

What are the sharp, wave-like grooves or ridges formed by strong winds on the ice plateau of East Antarctica called?

<p>Sastrugi (C)</p> Signup and view all the answers

Considering the Antarctic Treaty of 1961's aims, which activity would be permitted?

<p>Conducting scientific research on climate change. (A)</p> Signup and view all the answers

How might the discovery of Mount Erebus's volcanic ash in areas distant from the volcano impact scientific understanding of Antarctica?

<p>It suggests wider volcanic activity and potential geological instability than previously known. (A)</p> Signup and view all the answers

Given the physical adaptations of penguins, what ecological advantage do solid bones provide in their Antarctic habitat?

<p>Greater ease in diving and stability underwater. (C)</p> Signup and view all the answers

If a new scientific study revealed a previously unknown species of moss thriving in an area of Antarctica with geothermal activity beneath the ice, what would be a logical conclusion?

<p>The geothermal activity provides a localized, warmer microclimate that supports plant life. (D)</p> Signup and view all the answers

Considering Antarctica's designation as a 'Human Void Zone', what implication does this have for environmental conservation efforts?

<p>It suggests that conservation efforts should focus on preserving its current pristine state with minimal human interference. (A)</p> Signup and view all the answers

Given that India maintains multiple research stations in Antarctica, what strategic advantage does this offer in terms of scientific exploration?

<p>It allows for comprehensive data collection across different geographical areas and environmental conditions. (D)</p> Signup and view all the answers

Why is Antarctica considered a desert, despite being covered in ice?

<p>Because it receives very little annual precipitation. (D)</p> Signup and view all the answers

What is the key factor that differentiates the climate of the edges of Antarctica from its interior?

<p>The moderating influence of the surrounding oceans. (D)</p> Signup and view all the answers

How does the high altitude of the Antarctic landmass contribute to its low temperatures?

<p>It causes a decrease in temperature for every 100 meters increase in height. (A)</p> Signup and view all the answers

What evidence supports the theory that Tasmania and Antarctica were once part of the same landmass?

<p>The similarity of rock formations found in both regions. (D)</p> Signup and view all the answers

Why are the dry valleys, located within the Transantarctic Mountains, significant?

<p>They are the largest ice-free areas in Antarctica. (C)</p> Signup and view all the answers

What effect does Antarctica's high albedo have on its climate?

<p>It causes more solar energy to be reflected back into space, cooling the continent. (B)</p> Signup and view all the answers

How do ice shelves contribute to the overall size of the Antarctic Ice Sheet?

<p>They contribute to the overall size of the ice sheet by growing in winter. (B)</p> Signup and view all the answers

What is suggested by presence of sub-glacial lakes in Antarctica, such as Lake Vostok?

<p>The presence of unique and isolated ecosystems. (B)</p> Signup and view all the answers

How do katabatic winds contribute to the dryness of Antarctica?

<p>By rushing down mountains and reducing moisture in the air. (D)</p> Signup and view all the answers

What is the significance of the Antarctic Peninsula being the warmest part of Antarctica?

<p>It is the most frequently visited area by cruise ships and tourists. (D)</p> Signup and view all the answers

Which of these factors contributes most to Antarctica's extremely dry climate?

<p>The katabatic winds that flow down from the polar plateau, inhibiting precipitation. (B)</p> Signup and view all the answers

How does the Antarctic Treaty System ensure that Antarctica remains a zone of peace?

<p>By freezing all territorial claims and promoting international cooperation in scientific research. (A)</p> Signup and view all the answers

Why is temperature data predominantly collected at ground level in Antarctica?

<p>Temperature inversions frequently occur, making atmospheric readings less representative of the actual conditions. (D)</p> Signup and view all the answers

How does the geography of Antarctica influence its climate differently in East and West Antarctica?

<p>East Antarctica’s larger ice sheet contributes to lower overall temperatures compared to the more fragmented ice in West Antarctica. (C)</p> Signup and view all the answers

What is the most significant implication of the absence of a native population in Antarctica?

<p>It necessitates international cooperation and treaties to govern activities on the continent. (C)</p> Signup and view all the answers

Which option describes the combined impact of the Southern Ocean and the Antarctic Circumpolar Current on Antarctica?

<p>Isolating Antarctica climatically and maintaining its cold, stable environment. (A)</p> Signup and view all the answers

Why is measuring precipitation in Antarctica challenging, and how does this affect climate models?

<p>Most precipitation falls as snow, which is easily blown away by strong winds, creating uncertainties in climate models. (D)</p> Signup and view all the answers

How does the distribution of research stations across Antarctica contribute to our understanding of the continent?

<p>They are strategically located to study various aspects of the continent, from ice dynamics to atmospheric conditions. (C)</p> Signup and view all the answers

Given its unique status, what challenges does Antarctica face in terms of environmental protection and resource management?

<p>All of the above. (D)</p> Signup and view all the answers

Mount Erebus is located on the east side of Antarctica.

<p>False (B)</p> Signup and view all the answers

Mount Erebus was created by volcanic eruptions through the Ross Ice Shelf.

<p>True (A)</p> Signup and view all the answers

The Antarctic Treaty of 1961 allows for military activity in Antarctica.

<p>False (B)</p> Signup and view all the answers

Less than 50% of Antarctica is covered by a thick sheet of ice.

<p>False (B)</p> Signup and view all the answers

Humans live permanently throughout Antarctica.

<p>False (B)</p> Signup and view all the answers

Penguins do not have predators that can live in the brutally cold climate of Antarctica.

<p>True (A)</p> Signup and view all the answers

Antarctica is the largest continent on Earth.

<p>False (B)</p> Signup and view all the answers

The explorer Roald Amundsen was the first person to reach the South Pole.

<p>True (A)</p> Signup and view all the answers

The continent of Antarctica is located entirely in the Northern Hemisphere.

<p>False (B)</p> Signup and view all the answers

The waters surrounding Antarctica are known as the Southern Ocean.

<p>True (A)</p> Signup and view all the answers

West Antarctica constitutes 55 per cent of the continent's total surface area.

<p>False (B)</p> Signup and view all the answers

The Antarctic Treaty specifies that Antarctica shall be used for peaceful purposes only.

<p>True (A)</p> Signup and view all the answers

The coldest land temperataure recorded on Earth, -89.2°C, was recorded in Australia.

<p>False (B)</p> Signup and view all the answers

Antarctica is home to animals such as penguins and seals that are suited to very cold climates.

<p>True (A)</p> Signup and view all the answers

The average annual temperature in Antarctica is around 50°C.

<p>False (B)</p> Signup and view all the answers

Antarctica experiences strong winds up to 200 miles per hour.

<p>True (A)</p> Signup and view all the answers

Katabatic winds contribute to the low rainfall in Antarctica.

<p>True (A)</p> Signup and view all the answers

The Dry Valleys of Antarctica have not received rain for approximately 2 million years.

<p>True (A)</p> Signup and view all the answers

The longest river in Antarctica, the Onyx River, is about 400 kilometers long.

<p>False (B)</p> Signup and view all the answers

The North and South Poles receive approximately the same amount of sunlight annually.

<p>True (A)</p> Signup and view all the answers

A high albedo means that a surface absorbs most of the sunlight it receives.

<p>False (B)</p> Signup and view all the answers

East Antarctica is also known as Lesser Antarctica.

<p>False (B)</p> Signup and view all the answers

The Antarctic Peninsula is the part of Antarctica closest to Australia.

<p>False (B)</p> Signup and view all the answers

The Antarctic Ice Sheet is smallest in the summer and largest in the winter.

<p>True (A)</p> Signup and view all the answers

Lake Baikal is the largest sub-glacial lake in Antarctica.

<p>False (B)</p> Signup and view all the answers

Antarctica's territorial claims by various nations are fully enforced under international law.

<p>False (B)</p> Signup and view all the answers

The lowest land temperature ever recorded on Earth, at -89.2°C, was recorded at ground level at the Soviet Vostok Station in Antarctica in 1973.

<p>False (B)</p> Signup and view all the answers

East Antarctica is smaller in surface area compared to West Antarctica.

<p>False (B)</p> Signup and view all the answers

The Antarctic Treaty, initially signed in 1961, exclusively permits military activities on the continent for national defense purposes.

<p>False (B)</p> Signup and view all the answers

The average annual temperature for the entire continent of Antarctica remains consistently above -30°C.

<p>False (B)</p> Signup and view all the answers

Roald Amundsen was the first explorer to successfully reach the South Pole in 1911.

<p>True (A)</p> Signup and view all the answers

Antarctica is located entirely in the Northern Hemisphere, surrounding the North Pole, and lies completely within the Antarctic Circle.

<p>False (B)</p> Signup and view all the answers

The Southern Ocean consists of the waters surrounding Antarctica, including the southernmost portions of the Pacific Ocean, Atlantic Ocean, and Indian Ocean.

<p>True (A)</p> Signup and view all the answers

Precipitation levels are uniform across Antarctica, with an average of 200 millimetres of snowfall annually, regardless of the region.

<p>False (B)</p> Signup and view all the answers

The Antarctic Treaty of 1961 permits countries to use the area south of 60°S latitude for military exercises, as long as they don't involve nuclear weapons.

<p>False (B)</p> Signup and view all the answers

Mount Erebus is characterized by explosive eruptions that initially breached the 70 meters thick Ross Ice Shelf during its formation.

<p>False (B)</p> Signup and view all the answers

The presence of ash from Mount Erebus found in distant parts of Antarctica indicates consistently large, frequent eruptions rather than occasional events.

<p>False (B)</p> Signup and view all the answers

Penguins evolved approximately 40 to 50 million years ago and developed hollow bones to aid in swimming and diving in Antarctic waters.

<p>False (B)</p> Signup and view all the answers

Greater Antarctica's age, determined from tests on the Precambrian Shield, is estimated to be more than 570 million years, showcasing the continent's ancient geological history.

<p>True (A)</p> Signup and view all the answers

Due to the extreme cold and dry climate, the Antarctic continent is entirely barren, with no plant life capable of surviving in its harsh conditions.

<p>False (B)</p> Signup and view all the answers

Katabatic winds contribute to the low rainfall in Antarctica by transporting moisture-laden air masses from the ocean inland.

<p>False (B)</p> Signup and view all the answers

The Arctic and Antarctic regions receive approximately the same amount of sunlight annually, but the South Pole experiences significantly warmer temperatures due to ocean currents.

<p>False (B)</p> Signup and view all the answers

A high albedo, which signifies a surface's ability to reflect sunlight, causes Antarctica to absorb a larger proportion of the sun's energy, leading to surface warming.

<p>False (B)</p> Signup and view all the answers

The temperature in Antarctica increases by approximately 1°C for every 100 meters increase in altitude, because of the greenhouse effect.

<p>False (B)</p> Signup and view all the answers

East Antarctica is characterized by its relatively young geological formations and high volcanic activity, distinguishing it from the more stable West Antarctica.

<p>False (B)</p> Signup and view all the answers

The Antarctic Peninsula, known for being the coldest part of the continent, attracts fewer cruise ships due to its harsh and inaccessible environment.

<p>False (B)</p> Signup and view all the answers

The combined area of the Antarctic Ice Sheet is approximately twice the size of Russia, making it the largest single mass of ice on Earth.

<p>False (B)</p> Signup and view all the answers

Lake Vostok, located 4 km below the Antarctic ice sheet, is well-suited for recreational boating activities due to its calm waters and accessibility.

<p>False (B)</p> Signup and view all the answers

The Transantarctic Mountains, shorter than the European Alps, play a minimal role in influencing the ice dynamics of Antarctica.

<p>False (B)</p> Signup and view all the answers

Vinson Massif, while relatively easy to climb, faces accessibility challenges due to its isolation and the prevalence of moderate weather conditions.

<p>False (B)</p> Signup and view all the answers

Mount ______ is located on Ross Island in the Ross Sea in West Antarctica.

<p>Erebus</p> Signup and view all the answers

Mount Erebus has a permanent lake of ______ in its crater.

<p>lava</p> Signup and view all the answers

The Antarctic Treaty was established in ______.

<p>1961</p> Signup and view all the answers

Antarctica is also known as a Human ______ Zone due to the lack of permanent human settlement.

<p>Void</p> Signup and view all the answers

______ are primary inhabitants of Antarctica, well-adapted to the cold climate.

<p>Penguins</p> Signup and view all the answers

About 98 per cent of Antarctica is covered by a thick sheet of ______.

<p>ice</p> Signup and view all the answers

The longest river in Antarctica is the ______ River.

<p>Onyx</p> Signup and view all the answers

Both the Arctic and Antarctic regions are cold because they don't get any direct ______.

<p>sunlight</p> Signup and view all the answers

The surface of Antarctica has a high ______, which reflects sunlight back into space.

<p>albedo</p> Signup and view all the answers

East Antarctica is also known as Greater ______.

<p>Antarctica</p> Signup and view all the answers

The ______ is the fifth largest continent.

<p>Antarctica</p> Signup and view all the answers

West Antarctica is also known as Lesser ______ because it is smaller than East Antarctica.

<p>Antarctica</p> Signup and view all the answers

There are no permanent human ______ in Antarctica.

<p>settlements</p> Signup and view all the answers

Many cruise ships visit the Antarctic ______, which is the warmest part of Antarctica.

<p>Peninsula</p> Signup and view all the answers

The coldest land temperature recorded on Earth was in Antarctica at -89.2°______.

<p>C</p> Signup and view all the answers

The Antarctic Ice Sheet extends to almost 14 million square ______.

<p>kilometres</p> Signup and view all the answers

Lake ______ is the largest sub-glacial lake in Antarctica.

<p>Vostok</p> Signup and view all the answers

[Blank] was the first person to reach the South Pole.

<p>Roald Amundsen</p> Signup and view all the answers

The ______ Mountains separate East Antarctica from West Antarctica.

<p>Transantarctic</p> Signup and view all the answers

Antarctica is located entirely in the ______ Hemisphere.

<p>Southern</p> Signup and view all the answers

The ______ Treaty specifies that 'Antarctica shall be used for peaceful purposes only'.

<p>Antarctic</p> Signup and view all the answers

[Blank] Massif is the highest point in Antarctica.

<p>Vinson</p> Signup and view all the answers

Antarctica has no native ______ or government.

<p>population</p> Signup and view all the answers

The average annual temperature in Antarctica is around -50°______.

<p>C</p> Signup and view all the answers

Precipitation in Antarctica always falls as ______.

<p>snow</p> Signup and view all the answers

Mount Erebus, located on Ross Island in West Antarctica, was formed by volcanic eruptions through the 700 meters thick ______ Ice Shelf.

<p>Ross</p> Signup and view all the answers

The flat top of Mount Erebus was created when the summit buckled, forming a hole, that then filled with lava creating a ______ of molten lava.

<p>lake</p> Signup and view all the answers

The Antarctic Treaty of 1961 designates the area south of 60°S latitude cannot be used for military purposes or radioactive waste disposal, but only for peaceful ______.

<p>research</p> Signup and view all the answers

Antarctica is also known as a Human ______ Zone, primarily because permanent human settlements are absent due to the harsh climate and environmental conditions.

<p>Void</p> Signup and view all the answers

Penguins' wings have evolved over the centuries to resemble ______ or paddles, aiding their swimming and diving abilities in the cold Antarctic waters.

<p>flippers</p> Signup and view all the answers

India has established three research facilities in Antarctica: Dakshin Gangotri which is now a supply base, and ______ and Bharati, which are active research stations.

<p>Maitri</p> Signup and view all the answers

The coldest land temperature recorded on Earth was in Antarctica at ______ °C.

<p>-89.2</p> Signup and view all the answers

The ______ Treaty, signed by forty-five nations, dictates that Antarctica shall be used only for peaceful purposes.

<p>Antarctic</p> Signup and view all the answers

Unlike other continents, Antarctica has no ______ population or government of its own.

<p>native</p> Signup and view all the answers

[Blank] was the first explorer to reach the South Pole in 1911.

<p>Roald Amundsen</p> Signup and view all the answers

Although several countries claim parts of Antarctica, these claims are not recognized by the international community and cannot be enforced due to the ______ Treaty.

<p>Antarctic</p> Signup and view all the answers

The waters surrounding Antarctica, which are parts of the Pacific, Atlantic, and Indian Oceans, are collectively called the ______ Ocean.

<p>Southern</p> Signup and view all the answers

The eastern part of Antarctica, known as ______, faces the Atlantic and Indian Oceans.

<p>East Antarctica</p> Signup and view all the answers

The average annual temperature in Antarctica is approximately ______ °C, demonstrating its extreme cold climate.

<p>-50</p> Signup and view all the answers

West Antarctica is characterized by the Antarctic Peninsula and two large ice shelves known as the ______ and Ronne.

<p>Ross</p> Signup and view all the answers

The low rainfall in Antarctica is partly due to ______ winds, which rush down the sides of mountains.

<p>katabatic</p> Signup and view all the answers

The ______ River, though the longest in Antarctica, is only about 40 kilometers long.

<p>Onyx</p> Signup and view all the answers

The high ______ of Antarctica's surface means that a lot of the energy and sunlight received from the sun is reflected back into space.

<p>albedo</p> Signup and view all the answers

Because oceans store heat leading to milder temperatures and increased rainfall, only the ______ of Antarctica experience this effect due to the continent's large landmass.

<p>edges</p> Signup and view all the answers

[Blank] Antarctica, also known as Greater Antarctica, constitutes two-thirds of the continent's land area and is its oldest part.

<p>East</p> Signup and view all the answers

The ______ Peninsula is the warmest part of Antarctica, closest to South America, and a common destination for cruise ships.

<p>Antarctic</p> Signup and view all the answers

The Antarctic Ice Sheet can grow from about 3 million square kilometers in the summer to about 19 million square kilometers in the ______.

<p>winter</p> Signup and view all the answers

Lake ______, the largest of Antarctica's sub-glacial lakes, lies 4 km below the continental ice sheet and has been sealed from air and light for millions of years.

<p>Vostok</p> Signup and view all the answers

The ______ Mountains stretch across the entire continent, separating East Antarctica from West Antarctica, and contain rocks similar to those in Tasmania.

<p>Transantarctic</p> Signup and view all the answers

[Blank] Massif, located in the Sentinel Range of the Ellsworth Mountains, stands as the highest point in Antarctica at 4,892 meters.

<p>Vinson</p> Signup and view all the answers

Which hemisphere is Antarctica located in?

<p>Southern Hemisphere</p> Signup and view all the answers

What is the name of the treaty that governs Antarctica?

<p>Antarctic Treaty</p> Signup and view all the answers

What is the average annual temperature in Antarctica?

<p>Around -50°C</p> Signup and view all the answers

What is the name of the ocean surrounding Antarctica?

<p>Southern Ocean</p> Signup and view all the answers

What is the recorded coldest temperature in Antarctica?

<p>-89.2°C</p> Signup and view all the answers

Name one animal that lives in Antarctica.

<p>Penguins</p> Signup and view all the answers

What is the name of the explorer who first reached the South Pole?

<p>Roald Amundsen</p> Signup and view all the answers

Is there a native population in Antarctica?

<p>No</p> Signup and view all the answers

In what year the Antarctic Treaty was first signed?

<p>1961</p> Signup and view all the answers

What is the name of the famous volcano located in Antarctica?

<p>Mount Erebus</p> Signup and view all the answers

What is the name of the international agreement that protects Antarctica?

<p>Antarctic Treaty</p> Signup and view all the answers

What type of zone is Antarctica also known as, due to the absence of permanent human settlement?

<p>Human Void Zone</p> Signup and view all the answers

Name one of the hardy plants that can be found along the coast and on the Antarctic Peninsula.

<p>Pearlwort, mosses, or lichen</p> Signup and view all the answers

What primary inhabitants of Antarctica are known for their oily feathers and thick layer of fat?

<p>Penguins</p> Signup and view all the answers

What is the name given to winds that rush down the sides of mountains, contributing to low rainfall in Antarctica?

<p>katabatic winds</p> Signup and view all the answers

What is the term for the percentage of incoming sunlight reflected by a surface, contributing to Antarctica's cold temperatures?

<p>albedo</p> Signup and view all the answers

Name one of the seas that surround the continent of Antarctica.

<p>Ross Sea OR Bellingshausen Sea OR Amundsen Sea OR Weddell Sea</p> Signup and view all the answers

What is the name describing the sharp, wave-like grooves or ridges formed by strong winds on the ice plateau in East Antarctica?

<p>sastrugi</p> Signup and view all the answers

Which part of Antarctica is closest to South America?

<p>Antarctic Peninsula</p> Signup and view all the answers

What is the name of the largest sub-glacial lake in Antarctica?

<p>Lake Vostok</p> Signup and view all the answers

What mountain range separates East Antarctica from West Antarctica?

<p>Transantarctic Mountains</p> Signup and view all the answers

What is the name of the highest point in Antarctica?

<p>Vinson Massif</p> Signup and view all the answers

What is the name of the part of Antarctica also known as Greater Antarctica?

<p>East Antarctica</p> Signup and view all the answers

Explain how the Antarctic Treaty of 1961 protects Antarctica. Include two specific provisions from the treaty in your explanation.

<p>The Antarctic Treaty of 1961 protects Antarctica by ensuring it remains a zone for peaceful research and cooperation, preventing exploitation and militarization. Specifically, the treaty prohibits any country from claiming territory south of 60°S latitude and bans military activities and the disposal of radioactive waste.</p> Signup and view all the answers

Describe the formation of the lava lake in Mount Erebus's caldera.

<p>The flat top of Mount Erebus first buckled, creating a hole known as a caldera. Subsequent volcanic eruptions filled this caldera with molten lava, forming the permanent lava lake.</p> Signup and view all the answers

Why are penguins considered the primary inhabitants of Antarctica, and what evolutionary adaptations have allowed them to thrive in this environment?

<p>Penguins are considered primary inhabitants because they are abundant and well-adapted to Antarctica's harsh conditions. Their adaptations include oily feathers and a thick layer of fat for insulation, and solid bones for diving.</p> Signup and view all the answers

Explain why Antarctica is known as a 'Human Void Zone'.

<p>Antarctica is known as a 'Human Void Zone' because there are no permanent human settlements on the continent. Despite research stations and temporary workers, the land remains devoid of a permanent population.</p> Signup and view all the answers

How do the solid bones of penguins aid in their survival in Antarctica?

<p>Solid bones add weight, making it easier for penguins to dive into the water for food. They also negate the need for flight, as there are no land predators.</p> Signup and view all the answers

Describe the purpose and function of the research stations in Antarctica.

<p>Research stations in Antarctica are established by governments of many countries and serve as homes and bases for research scientists. They are used to conduct scientific studies in various fields and allow scientists to live and work temporarily studying the continent.</p> Signup and view all the answers

Besides research, what makes Antarctica unique in terms of population and governance?

<p>Antarctica has no native population or government and does not belong to any one nation.</p> Signup and view all the answers

How does the Antarctic Treaty influence the territorial claims made by several countries on Antarctica?

<p>The treaty specifies that Antarctica should be used for peaceful purposes only, and it prevents claimant countries from enforcing their claims.</p> Signup and view all the answers

Describe the key difference in climate between the coastal and interior mountainous regions of Antarctica.

<p>Coastal regions receive more precipitation (around 200 mm annually), while mountainous regions and the East Antarctica plateau receive less than 50 mm annually</p> Signup and view all the answers

Explain how the waters surrounding Antarctica are geographically defined, and what they are collectively known as.

<p>The waters surrounding Antarctica are the southernmost parts of the Pacific, Atlantic, and Indian Oceans beyond the Antarctic Circle; these are collectively known as the Southern Ocean.</p> Signup and view all the answers

Identify the explorer credited with first reaching the South Pole and provide the year of this achievement.

<p>Roald Amundsen was the first person to reach the South Pole in 1911.</p> Signup and view all the answers

In what ways does the Antarctic Treaty System ensure that Antarctica remains a place of international cooperation and peace?

<p>By demilitarizing the continent, promoting scientific research, and prohibiting mineral exploitation.</p> Signup and view all the answers

How do ice shelves such as the Ross and Ronne, influence the geography of West Antarctica?

<p>They extend the landmass into the surrounding ocean and contribute to the overall ice coverage of the continent.</p> Signup and view all the answers

Describe the conditions that led to the record of the lowest recorded temperature on Earth, specifiying location and year.

<p>The temperature of -89.2°C was recorded at ground level at the Soviet Vostok Station in Antarctica in 1983.</p> Signup and view all the answers

What are the major differences between East and West Antarctica in terms of geography and which oceans border East Antarctica?

<p>East Antarctica is larger and faces the Atlantic and Indian Oceans; West Antarctica is smaller, prolonged by the Antarctic Peninsula, and lies south of South America.</p> Signup and view all the answers

Explain how Antarctica's high albedo contributes to its extreme cold temperatures.

<p>The high albedo of Antarctica causes a large portion of the sunlight it receives to be reflected back into space, reducing the amount of solar energy absorbed by the surface and contributing to lower temperatures.</p> Signup and view all the answers

Describe the role of katabatic winds in contributing to low rainfall in some parts of Antarctica.

<p>Katabatic winds are winds that rush down the sides of mountains. These winds contribute to low rainfall because they are typically dry winds, and when they descend, they tend to further suppress precipitation.</p> Signup and view all the answers

Compare and contrast the general geological stability of East Antarctica and West Antarctica.

<p>East Antarctica is geologically more stable and older, while West Antarctica is less stable, comprising mountainous islands covered in a thinner ice sheet.</p> Signup and view all the answers

Explain why the Antarctic Peninsula is considered the warmest part of Antarctica.

<p>The Antarctic Peninsula, closest to South America, experiences milder temperatures due to its lower latitude and the influence of ocean currents, making it relatively warmer than other parts of the continent.</p> Signup and view all the answers

Describe how the Transantarctic Mountains influence the ice sheets of East Antarctica.

<p>The Transantarctic Mountains act as a barrier, holding back the ice in East Antarctica and preventing it from flowing into West Antarctica or the surrounding seas.</p> Signup and view all the answers

Discuss the significance of Lake Vostok in the context of Antarctica's sub-glacial environment.

<p>Lake Vostok, the largest sub-glacial lake in Antarctica, provides a unique environment that has been sealed off from the atmosphere for millions of years, offering potential insights into ancient life and geological history.</p> Signup and view all the answers

Explain how Antarctica's location around the geomagnetic South Pole contributes to its unique climatic conditions.

<p>Antarctica's landmass is unevenly spread around the geomagnetic South Pole which, along with its high altitude and latitude, results in long periods of darkness during winter and extreme cold temperatures.</p> Signup and view all the answers

Describe what Sastrugi are and how they are formed.

<p>Sastrugi are sharp, wave-like grooves or ridges formed on the snow surface of East Antarctica's ice plateau by strong winds cutting and shaping the snow.</p> Signup and view all the answers

Explain why, despite receiving the same amount of sunlight, the South Pole is much colder than the North Pole?

<p>The South pole is much colder than the North Pole because of its high altitude and the fact that it is a large landmass, whereas the North Pole is mostly ocean. Land cools faster than oceans.</p> Signup and view all the answers

What evidence suggests that Tasmania and Antarctica were once part of the same landmass?

<p>The rocks in the Transantarctic Mountain Range are similar to those found on Mount Wellington in Tasmania. This rock similarity suggests that Tasmania and Antarctica were once part of the same landmass.</p> Signup and view all the answers

Flashcards

Mount Erebus

An active volcano on Ross Island with a permanent lava lake in its caldera.

Caldera

A hole on a volcano top, often filled with lava after eruptions.

Antarctic Treaty (1961)

An international agreement designating Antarctica for peaceful research, banning military activity and waste disposal.

Human Void Zone (Antarctica)

A region devoid of permanent human settlement due to harsh conditions.

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Penguins

Birds adapted to cold climates with oily feathers and a thick layer of fat.

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Dakshin Gangotri

Indian research station in Antarctica, now used as a supply base.

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Antarctica

Fifth largest continent, almost completely covered in ice, no permanent human settlements.

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Antarctica's native animals

Penguins, seals, and other species adapted to extremely cold environments.

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Coldest temperature on Earth

-89.2°C, recorded at the Soviet Vostok Station in 1983.

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Location of Antarctica

Located entirely in the Southern Hemisphere, surrounding the South Pole.

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Oceans surrounding Antarctica

Southernmost parts of the Pacific, Atlantic, and Indian Oceans.

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Southern Ocean

The waters of the Pacific, Atlantic, and Indian Oceans beyond the Antarctic Circle.

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East Antarctica

Eastern part of Antarctica, facing the Atlantic and Indian Oceans.

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Antarctic Treaty

It specifies that Antarctica shall be used for peaceful purposes only.

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Antarctica's climate

Extremely cold and dry, with average annual temperature around -50°C.

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Katabatic Winds

Winds that rush down the sides of mountains, contributing to low rainfall in Antarctica.

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Dry Valleys

A region in Antarctica that has not received rain for approximately 2 million years.

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South Pole Temperature

Even though the North and South pole receive roughly the same amount of sunlight, the South Pole is much colder.

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Albedo Effect (Antarctica)

The reflection of sunlight back into space due to the surface properties of Antarctica.

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Sastrugi

Sharp, wave-like grooves or ridges formed by strong winds on the ice plateau of East Antarctica.

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Antarctic Peninsula

The part of Antarctica closest to South America, known as the warmest region visited by cruise ships.

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Ice Shelves

Extensive floating sheets of ice attached to a landmass.

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Transantarctic Mountains

A mountain range stretching across Antarctica, separating East and West Antarctica.

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Roald Amundsen

Explorer who first reached the South Pole in 1911.

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The South Pole

Located in Antarctica; the southernmost point on Earth.

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Two large ice shelves

The Ross and Ronne

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International Community

They do not recognize nation claims due to the Antarctic treaty.

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Antarctica's Precipitation

Falls as snow; about 200 mm annually in coastal regions.

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The Onyx River

The longest river in Antarctica, measuring only about 40 kilometers long.

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Greater Antarctica

East Antarctica, the larger portion, characterized by an ice plateau.

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Lesser Antarctica

West Antarctica, the smaller, less stable region with mountainous islands.

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Antarctic Ice Shelves

Extensive sheets of ice floating on the ocean while attached to land.

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Amundsen Sea

A sea bordering West Antarctica, known for its icebergs.

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Lake Vostok

A vast subglacial lake, the largest in Antarctica, sealed under ice for millions of years.

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Vinson Massif

Antarctica's highest peak, located in the Ellsworth Mountains.

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Albedo

A measure of how much sunlight or energy a surface reflects.

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Mount Erebus Formation

Volcanic mountain on Ross Island formed by eruptions through the Ross Ice Shelf.

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Erebus' Caldera

Flat top of Mount Erebus, created by a buckling summit and filled with molten lava.

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Antarctic Treaty Details

The 1961 agreement that protects Antarctica for peaceful purposes like scientific research.

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Human Status in Antarctica

Continent with no permanent inhabitants, only temporary researchers and explorers.

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Penguin Adaptations

Waterproof coat and thick fat layer for insulation for extreme cold in penguins.

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Maitri and Bharati

Indian active research stations in Antarctica.

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Antarctica's size

The fifth largest continent on Earth.

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Antarctica's inhabitants

Scientists conduct research there, but there are no permanent residents.

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Countries claiming Antarctica

Argentina, Australia, Chile, France, New Zealand, Norway and the United Kingdom.

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Antarctica's unique status

It has no native population or government and does not belong to any one nation.

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The Southern Ocean

The waters of the Pacific, Atlantic, and Indian Oceans surrounding Antarctica.

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The Antarctic Treaty

A treaty that protects Antarctica for peace.

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Katabatic Winds (Antarctica)

Strong winds rushing down mountain slopes, reducing rainfall.

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Why Antarctica is Cold and Dry

Receives less direct sunlight, long winter nights, high albedo, high altitude, large landmass.

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Major Antarctic Ice Shelves

Ross, Larsen, Amery, Ronne.

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Seas of the Southern Ocean

Ross Sea, Bellingshausen Sea, Amundsen Sea, Weddell Sea.

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Erebus Volcano

One of the world's most active volcanoes, located on Ross Island.

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Ross Ice Shelf

A floating extension of glacial ice, typically very thick.

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Antarctic Flora

Plants that have adapted to survive in Antarctica.

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Antarctic Seabirds

A group of seabirds including 24 species of petrels.

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Antarctic Zooplankton

Marine organisms forming the base of the Antarctic food web.

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Antarctic Precipitation

The average yearly precipitation in Antarctica, falling as snow.

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Mount Erebus Age

Volcanic mountain created by eruptions through the Ross Ice Shelf roughly one million years ago.

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Mount Erebus Summit

The highest point of Mount Erebus, reaching 3,794 meters.

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Antarctic Treaty Content

States the area south of 60°S latitude cannot be claimed by any country and is for peaceful research only.

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Antarctic Hardy Plants

Plants like pearlwort, mosses, and lichen that are found along the coast and on the Antarctic Peninsula

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Penguin Features

The primary inhabitants of Antarctica that have oily feathers and a thick layer of fat for insulation.

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Maitri Research Station

Second Indian research facility in Antarctica.

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Antarctic winds

Strong winds recording speeds up to 200 mph.

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Low Sun Angle

The angle of the sun is low, spreading energy over a large area.

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Ice shelf growth

A large amount of growth actually occurs because of ice shelves

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Bellingshausen Sea

A sea bordering West Antarctica

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Weddell Sea

A sea bordering West Antarctica

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Dry Valleys (Antarctica)

Ice-free areas within the Transantarctic Mountains.

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Cold air precipitation?

Cold air cannot hold as much water vapour as warm air so precipitation is less likely

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Antarctic Ice

Ice is always moving and building up.

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Antarctica's elevation/climate

High altitude, considered a cold desert.

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Antarctic Research Stations

They provide homes for scientists.

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Antarctic Treaty restrictions

No military activity allowed.

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Penguin oily feathers

They provide a waterproof coat.

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Penguin solid bones

These add weight for diving.

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Antarctic Circle

Area surrounding the South Pole.

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-50°C

Average annual temperature in Antarctica.

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200 mm (coastal)

Precipitation that falls annually in Antarctica.

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Smaller part of Antarctica.

West Antarctica

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Antarctic Ice Shelf

Floating extension of glacial ice attached to land.

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Seas Near Antarctica

Seas surrounding Antarctica: Ross, Bellingshausen, Amundsen, Weddell.

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Antarctic Treaty's Purpose

The international agreement protecting Antarctica for peaceful research and prohibits military activities.

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Antarctica's Ice Condition

Because its ice is always moving and accumulating, creating a dynamic environment.

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Antarctica's Plant Life

Pearlwort, mosses, and lichen; tough species that can endure.

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Antarctica's Climate Type

An exceptionally cold and dry environment, technically a desert.

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Antarctic Seals

They are adapted with thick blubber to insulate them from frigid waters.

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Penguin Evolution

They evolved over millions of years to survive in the cold climate.

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Antarctica's Size and Ice

The fifth largest continent, covered almost entirely in ice.

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First to South Pole

Explorer who was the first to reach the South Pole in 1911.

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Antarctica's Hemisphere

The continent is located entirely in the Southern Hemisphere, surrounding the South Pole.

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East Antarctica's Ocean Faces

East Antarctica faces the Atlantic and Indian Oceans.

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West Antarctica's Size

West Antarctica constitutes only 5% of the continent's total surface area.

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Antarctica's Temperature

Average annual temperature is around -50°C. It has an extremely cold, dry climate.

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Antarctica's Territorial Status

They do not recognize nation claims due to an international treaty.

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Antarctica's Lack of Residents

Extreme climatic conditions that make permanent residence impossible.

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Ross Sea

A sea surrounding Antarctica, known for being part of the Southern Ocean.

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Antarctica's Uniqueness

A continent, but with no native population

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Antarctica's Climate Conditions

Extremely cold and dry, with an average annual temperature around -50°C.

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Antarctic Treaty Main Goal

The treaty specifies that Antarctica shall be used for peaceful purposes only.

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Antarctica Ice Sheet

Ice sheets extending 14 square million kilometres in the summer.

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Antarctic Dryness Cause

Antarctica's driest areas due to winds.

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Antarctica's Low Sun Angle

The sun is low on the horizon therefore energy spreads over large area.

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Geomagnetic South Pole

Landmass spreads unevenly around it.

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High Land Altitude

Decreases by approximately 1°C for every 100 m increase in height.

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Winter Darkness

It has 24 hours of darkness for most periods during winter.

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Antarctica's Elevation

The continent with the highest average elevation.

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Mount Erebus Location

An active volcano in West Antarctica with a lava lake.

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Antarctic Treaty Focus

International agreement preserving Antarctica for research.

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Penguin bones

Reason for penguins inability to fly.

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60°S Latitude

Latitude south which no country can claim sovereignty.

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Maitri and Bharati location

India's active research stations in Antarctica.

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Antarctic Treaty Nations

The treaty signed by 45 nations, maintains Antarctica for peaceful purposes only.

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Antarctic Temperatures

Temperatures dropping below -60°C in winter and -20°C in summer.

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Antarctic Precipitation Amounts

Less than 50 millimeters annually and it is hard to measure.

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Antarctica Ice Thickness

Ice sheet on average 1.9 km thick.

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Antarctica's Protected Status

A protected wilderness south of 60°S latitude.

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Penguin Bone Density

Solid and heavier to aid in diving.

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Penguin's Fat Layer

Provide insulation in freezing waters.

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Penguin Wing Adaptation

They evolved to resemble flippers.

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World Penguin Day

Observed on April 25th each year.

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Antarctic Dry Valleys

Cold, desert areas in Antarctica that have not received precipitation for millions of years.

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Study Notes

  • Antarctica is the fifth-largest continent, almost entirely covered in ice.
  • Antarctica is extremely cold with no permanent human settlements; research stations exist for scientists.
  • Penguins, seals, and other cold-climate animals that are suited to the cold habitats.
  • The coldest land temperature recorded was -89.2°C at the Soviet Vostok Station in 1983.
  • The South Pole is located in Antarctica, reached first by Roald Amundsen in 1911.

Location

  • Antarctica is located entirely in the Southern Hemisphere, surrounding the South Pole, within the Antarctic Circle.
  • Surrounded by the southernmost parts of the Pacific, Atlantic, and Indian Oceans known as the Southern Ocean.
  • Ice sheets extend 14 million square kilometers in the summer.
  • East Antarctica faces the Atlantic and Indian Oceans.
  • West Antarctica is only 5% of the continent's total surface area.
  • The Antarctic Peninsula and the Ross and Ronne ice shelves prolong West Antarctica.
  • West Antarctica is south of South America.

Status

  • Antarctica has no native population or government and does not belong to any one nation.
  • Argentina, Australia, Chile, France, New Zealand, Norway, and the United Kingdom claim parts of Antarctica.
  • The international community does not recognize these claims because of the Antarctic Treaty.
  • The Antarctic Treaty, signed in 1961 by twelve nations, states that Antarctica is to be used for peaceful purposes only.
  • Forty-five nations have signed the Antarctic Treaty.

Climate

  • Antarctica has an extremely cold, dry climate, with an average annual temperature of around -50°C.
  • Temperatures in mountainous, interior regions drop below -60°C in winter and -20°C in summer.
  • Precipitation, always as snow, is about 200 mm annually in coastal regions and less than 50 mm in mountainous regions and on the East Antarctica plateau.
  • Strong winds reach up to 200 mph.
  • Katabatic winds contribute to low rainfall; they rush down the sides of mountains.
  • The Dry Valleys have not received rain for around 2 million years.
  • The longest river, the Onyx River, is only about 40 kilometers long.
  • Both the Arctic and Antarctic regions receive indirect sunlight.
  • The South Pole is much colder than the North Pole, despite receiving the same amount of sunlight.

Factors Contributing to Cold and Dry Climate

  • Low angle of the sun spreads energy over a large area.
  • Extended periods of darkness during winter.
  • High albedo reflects sunlight back into space.
  • High altitude causes temperature to decrease by approximately 1°C for every 100 m increase in height.
  • Cold air cannot hold much water vapor.
  • Antarctica's size limits the moderating effect of oceans to the edges of the continent.

Division of Antarctica

  • Antarctica's landmass spreads unevenly around the geomagnetic South Pole.
  • Cold deserts and large ice shelves make it up.

East Antarctica

  • East Antarctica, also known as Greater Antarctica takes up two-thirds of the continent's land area.
  • It is the oldest part of Antarctica.
  • An ice plateau at the center of East Antarctica rises 3,000 meters above sea level.
  • Strong winds create sastrugi, sharp, wave-like grooves or ridges in the snow on the plateau.

West Antarctica

  • West Antarctica, also known as Lesser Antarctica, is smaller than East Antarctica.
  • It is less geologically stable and covered in a thin ice sheet.
  • It includes mountainous islands with an ice sheet and the Antarctic Peninsula.
  • The Antarctic Peninsula is closest to South America.
  • Many islands, such as the South Shetland Islands, are found off the Antarctic Peninsula.
  • The warmest part of Antarctica and a destination for many cruise ships.

Ice, Sea and Lakes

  • The Antarctic and Greenland ice sheets contain over 99% of the freshwater ice on Earth.
  • The Antarctic Ice Sheet extends to almost 14 million square kilometers, roughly equal to the combined area of the United States and Mexico.
  • It contains 30 million cubic kilometers of ice.
  • The size of the ice sheet varies from about 3 million square kilometers in summers to about 19 million square kilometers in winters.
  • This growth occurs partially because of ice shelves

Ice Shelves Include

  • Ross Ice Shelf
  • Larsen Ice Shelf
  • Amery Ice Shelf
  • Ronne Ice Shelf
  • These shelves contribute to the growth of the ice sheet

Seas Surrounding Antarctica

  • Ross Sea
  • Bellingshausen Sea
  • Amundsen Sea
  • Weddell Sea

Sub-Glacial Lakes

  • Antarctica has over 160 sub-glacial lakes.
  • Lake Vostok is the largest, lying 4 km below the continental ice sheet.
  • Lake Vostok means Lake East in Russian
  • The water in Lake Vostok has been sealed from air and light for possibly 35 million years.

Mountain Ranges

  • The mountain ranges are longer and higher than the European Alps but are buried under snow and ice.
  • The peaks are battered by strong winds and storms.

Transantarctic Mountains

  • The Transantarctic Mountain Range is 3,500 kilometers long.
  • It separates East Antarctica from West Antarctica.
  • Rocks in this range are similar to those on Mount Wellington in Tasmania, giving evidence that Tasmania and Antarctica were once part of the same landmass.
  • Some peaks are more than 4,300 meters high.
  • Dry valleys, the largest ice-free areas in Antarctica, are closer to sea level.
  • The range acts as a dam, holding back the ice in East Antarctica.

Vinson Massif

  • Vinson Massif is the highest point in Antarctica at 4,892 meters.
  • It is in the Sentinel Range of the Ellsworth Mountains in West Antarctica.
  • Named after Carl Vinson, a supporter of Antarctic research.
  • It is isolated, making it difficult to access with extreme weather conditions that average -29°C in summer.

Mount Erebus

  • Located on Ross Island in the Ross Sea in West Antarctica
  • Active volcanoes in Antarctica include Mount Erebus.
  • Mount Erebus was created by volcanic eruptions through the 700 meters thick Ross Ice Shelf.
  • The volcano is around one million years old.
  • One of the most active volcanoes globally.
  • The summit of Mount Erebus rises to 3,794 meters
  • It contains a permanent lava lake in its caldera.
  • The flat top of the volcano was created when the summit buckled, creating a hole known as a caldera
  • Eruptions are usually small, but large eruptions have occasionally occurred with ash found far away.

Life in Antarctica

  • The ice is constantly moving, accumulating, and is the highest of all the continents
  • Considered a cold desert, no humans live there permanently.
  • Research stations are set up by various countries on rocks and ice.
  • Antarctica is the last true wilderness on Earth, protected by the Antarctic Treaty of 1961.
  • The treaty states that the area south of 60°S latitude cannot be claimed by any country, used for military purposes, or to dispose of radioactive waste.
  • It is only for peaceful research.
  • Antarctica is also known as a Human Void Zone, without any long term human inhabitants.
  • The continent is nearly barren due to the cold and dry climate.
  • Hardy plants such as pearlwort, mosses, and lichen are found along the coast and on the Antarctic Peninsula.
  • Life is abundant in the sea and along the coast.
  • Several seabirds make Antarctica their home, including twenty-four species of petrels.
  • A wide variety of animals inhabit the Antarctic waters, from zooplankton to seals and whales.
  • Penguins primarily inhabit Antarctica
  • They evolved 40 to 50 million years ago.
  • They have oily feathers for waterproofing and a thick layer of fat for insulation.
  • Penguins have solid bones for diving which prevent them from flying.
  • Their wings have evolved over the centuries to resemble flippers or paddles.
  • 25th April is observed as World Penguin Day.

Key Facts

  • About 98% of Antarctica is covered by an ice sheet, averaging around 1.9 kilometers thick, and up to 4.5 kilometers in some places.
  • Tests reveal that Greater Antarctica is more than 570 million years old.
  • India has set up three research facilities: Dakshin Gangotri (now a supply base), Maitri, and Bharati (active research stations).
  • India is one of nine nations to have multiple research stations within the Antarctic Circle.
  • The Antarctic Ice Sheet is roughly equal to the combined area of the United States and Mexico.

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