Explore the Vast Oceans

Questions and Answers

What does marine science cover?

Only the ocean and whales

Only the ocean and coral reefs

Only the ocean and its shores

The ocean, its shores, and other bodies of water such as lakes and rivers (correct)

What percentage of the earth's surface is covered in water?

Exactly 75 percent

Over 80 percent

Exactly 50 percent

About 70 percent (correct)

What will you learn in this unit?

Only how the earth and its oceans were created

How the earth and its oceans were created, plate tectonics movements, and the scientific method in marine science (correct)

Only the scientific method in marine science

Only plate tectonics movements

What is marine science also known as?

Oceanography Signup and view all the answers

What does marine science study?

The ocean, its shores, and all life that depends on these places Signup and view all the answers

What is the percentage of water compared to land covering the globe?

Over twice as much water as land Signup and view all the answers

What is the rate at which Venice, Italy is sinking due to rising oceans and muddy land?

5 to 10 centimeters per century Signup and view all the answers

What causes ocean water to expand, thereby raising sea levels?

Warm temperatures Signup and view all the answers

For how long have changes in sea level been at the current level?

About 2,500 years Signup and view all the answers

What is a hypothesis in the scientific method?

A scientist's initial best guess at an answer to a question Signup and view all the answers

When are observations used in scientific inquiry?

When experimentation is not feasible, involving recording and analyzing details Signup and view all the answers

What happens to a hypothesis that can consistently be proven true?

Becomes a theory Signup and view all the answers

What did Alfred Wegener propose regarding the current continents?

They were once part of a single landmass called Pangaea Signup and view all the answers

What causes seafloor spreading?

Magma filling the gaps between plates and pushing them apart Signup and view all the answers

What type of boundary forms when plates move towards each other?

Convergent boundaries Signup and view all the answers

What drives the movement of tectonic plates?

The Earth's mantle Signup and view all the answers

How do divergent boundaries contribute to the formation of bodies of water like the Red Sea?

$Magma$ $fills$ $the$ $gap$ $between$ $plates$ $and$ $creates$ $valleys$ $and$ $ridges$ Signup and view all the answers

What determines the physical edges or boundaries of tectonic plates?

The physical shape of the plates Signup and view all the answers

What type of boundary can result in one plate sliding above another, leading to the formation of ridges, mountain ranges, and underwater volcanoes?

Convergent boundary Signup and view all the answers

What is the most active volcano on Earth located on the Big Island of Hawaii?

Mauna Loa Signup and view all the answers

What contributes significantly to changes in sea levels?

Icebergs melting due to increased temperatures Signup and view all the answers

What type of boundary creates gaps on the ocean floor, leading to changes in sea levels as water fills the gaps?

Divergent boundary Signup and view all the answers

What type of plate movement can lead to underwater earthquakes, resulting in tsunamis that can devastate island nations?

Movement of plates in the ocean Signup and view all the answers

What do marine scientists study to understand the global impact of sea level changes on the environment?

Ocean floor and its shifting landscape Signup and view all the answers

What percentage of Earth's water is found in the oceans?

97% Signup and view all the answers

What accounts for less than 0.25% of Earth's weight?

The hydrosphere Signup and view all the answers

What is the temperature of the inner core of the Earth?

$9000$ degrees or higher Signup and view all the answers

What is the composition of the outer core of the Earth?

Nickel and iron Signup and view all the answers

What causes earthquakes on the Earth's surface?

Plate movement on the mantle Signup and view all the answers

What fills the majority of freshwater on Earth?

Groundwater Signup and view all the answers

Study Notes

The Ocean is a Vast Space

An ocean is a large body of salt water that fills a large depression in the earth’s surface.
Seas are technically also oceans, but the term sea is generally used to refer to smaller bodies of saltwater.
The hydrosphere, the total mass of water on, under, or above the planet's surface, accounts for less than 0.25% of Earth's weight.
97% of Earth’s water is found in the oceans, with the majority of freshwater held in glaciers.
Salt water makes up 97.5% of the world’s water, while freshwater makes up only 2.5%.
The earth's surface is mostly water when seen from space.
The earth's surface cooled, allowing rain to form the oceans, filling the lower points on the uneven surface.
The Earth's crust is the thinnest layer, made of many uneven pieces called plates that float on the mantle.
Plate movement on the mantle causes earthquakes, and the surface of the Earth is not stable.
The outer core and inner core of the Earth have distinct physical and chemical properties.
The outer core is in a liquid state due to high temperatures and is made of nickel and iron.
The inner core is incredibly hot with temperatures of 9,000 degrees or higher, and has incredible pressure of 45 million pounds per square inch.

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Description

Dive into the fascinating world of oceans and seas with this quiz. Discover interesting facts about the hydrosphere, ocean formation, and the Earth's structure.