Earth's Rotation: Day and Night

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Questions and Answers

How long does it take for the Earth to complete one rotation on its axis?

  • 24 hours (correct)
  • 12 hours
  • 7 days
  • 365.25 days

What phenomenon is primarily caused by the Earth's rotation?

  • Tidal changes
  • The phases of the moon
  • Day and night (correct)
  • The changing of the seasons

If the Earth stopped rotating, what would be the most likely result for the half facing the sun?

  • Alternating periods of day and night
  • Constant night and freezing temperatures
  • Mild temperatures and normal day/night cycles
  • Constant day and continuous warmth (correct)

What is the movement of the Earth around the Sun called?

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

Approximately how long does it take for the Earth to complete one revolution around the Sun?

<p>365.25 days (B)</p> Signup and view all the answers

Which of the following is an effect of the Earth's revolution around the Sun?

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

What is defined as a temporary period of change in climate?

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

What causes the different seasons on Earth?

<p>The Earth's axial tilt and its revolution around the Sun (D)</p> Signup and view all the answers

During which solstice does the North Pole tilt directly toward the Sun?

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

When does the wet season typically occur in the Philippines?

<p>June to September (D)</p> Signup and view all the answers

What are the typical characteristics of the dry season in the Philippines?

<p>Cloudless and hot days (A)</p> Signup and view all the answers

Between which months does the dry season usually occur in the Philippines?

<p>January to May (D)</p> Signup and view all the answers

Which primary factor contributes to the Philippines experiencing high temperatures and high humidity?

<p>Location near the equator (C)</p> Signup and view all the answers

What is the seasonal wind system known as in the Philippines?

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

Which monsoon is responsible for bringing heavy rains and creating the wet season in the Philippines?

<p>Southwest Monsoon (Habagat) (B)</p> Signup and view all the answers

Which monsoon is associated with creating the dry season in the Philippines?

<p>Northeast Monsoon (Amihan) (D)</p> Signup and view all the answers

How would the length of day and night be affected if Earth's axis were not tilted?

<p>Day and night would be equal in length everywhere on Earth. (A)</p> Signup and view all the answers

If the Earth's orbit were perfectly circular instead of elliptical, which of the following would likely NOT occur?

<p>Seasons that are more predictable and uniform in intensity. (D)</p> Signup and view all the answers

In a hypothetical scenario where Earth's rotation slowed significantly, what would be the most immediate consequence for coastal regions?

<p>Changes in global ocean currents and weather patterns. (B)</p> Signup and view all the answers

How might the elimination of monsoon seasons affect agriculture in a country like the Philippines?

<p>Reduced crop yields due to water scarcity. (A)</p> Signup and view all the answers

How is the length of a day related to the speed of the Earth's rotation?

<p>Slower rotation means longer days. (D)</p> Signup and view all the answers

If Earth's axis had no tilt, how would this influence the experience of seasons in temperate regions?

<p>The seasons would be identical throughout the year. (C)</p> Signup and view all the answers

What would be the immediate result on areas nearest the equator, if the Earth's rotation suddenly sped up?

<p>These areas would experience higher wind speeds. (A)</p> Signup and view all the answers

What changes would happen to a monsoon-dependent region if the Earth's revolution time shortened?

<p>The annual cycle of monsoons would become unpredictable and staggered. (B)</p> Signup and view all the answers

What adjustments would farmers most likely need to make if the dry season in the Philippines progressively extended?

<p>Implement more drought resistance farming and water harvesting techniques (B)</p> Signup and view all the answers

Why is it still warm during the wet season due to Habagat, despite the frequent heavy rains?

<p>The air's ability to hold moisture prevents the efficient dissipation of heat. (D)</p> Signup and view all the answers

Which mitigation strategy would be LEAST useful for an agriculture sector that experienced prolonged Amihan seasons?

<p>Cultivating crops that require consistent warm, moist environments. (A)</p> Signup and view all the answers

What ecological impact is mostly associated with altered wind patterns and prolonged Habagat seasons?

<p>Nutrient runoff from soils, leading to eutrophication in river systems and coastal waters. (C)</p> Signup and view all the answers

How can local communities prepare for extended periods with the Amihan monsoon?

<p>Harvesting of rainwater, constructing water reservoirs and adopting water efficient agriculture. (A)</p> Signup and view all the answers

Which one of these occurrences is least related to the rotation of Earth?

<p>The seasonal changes that influence temperatures and precipitation. (C)</p> Signup and view all the answers

The Earth is at Perihelion(closest to the Sun) on January 5th, and Aphelion(farthest from the sun) on July 5th. How does this affect seasons in the Philippines?

<p>Seasons are still primarily based on monsoon patterns and location near the equator. (D)</p> Signup and view all the answers

If global warming increases ocean temperatures, how would it affect a community used to Habagat?

<p>More intense rain due to more moisture and energy(heat) available. (D)</p> Signup and view all the answers

Where would a community relocate to in the Philippines, if there was a prolonged amiha?

<p>Near abundant water sources, like springs. (B)</p> Signup and view all the answers

For a specific season, how does the Earth's tilt impact the incidence and intensity of solar radiation received at a given location?

<p>It leads to the angle of the incoming light, which directly impacts the warmth. (B)</p> Signup and view all the answers

Compared to areas further away from the equator, what is true about areas near the equator in the Philippines?

<p>Areas near the Equator experience less variability in day length throughout the year. (A)</p> Signup and view all the answers

If a meteorologist mentioned that a community would be experiencing La Niña what can be derived about rainfall?

<p>Higher Rainfall than average, where higher humidity means larger storm clouds. (C)</p> Signup and view all the answers

Assuming a community planned a celebration, around the summer solstice when the axis is tilted towards the sun, and the Earth's revolution path was sped up. What can be said about their celebration date?

<p>The people need to prepare for it to celebrate sooner as the solstice date will come sooner than expected, due to Earth’s revolution speed changes. (D)</p> Signup and view all the answers

The municipality of San Bernando planned to reforest. Which time of the year they would want to start?

<p>San Bernando should aim to reforest when La Niña is at play. (B)</p> Signup and view all the answers

Flashcards

What is Earth's rotation?

The spinning of Earth on its axis.

What causes day and night?

The movement of the Earth on its axis, causing day and night.

How long is one Earth rotation?

One full rotation takes 24 hours.

Day and Night distribution

Day on the side facing the sun, night on the opposite side.

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What is Earth's Axial Tilt?

Earth is tilted on its axis at a 23.5 degree angle.

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Unequal Day/Night Length

The Earth's tilt causes day and night to be unequal.

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What if Earth didn't rotate?

One side would always face the sun and the other would be dark.

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What is Earth's revolution?

Earth's movement around the Sun.

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Celestial Revolutions

The moon orbits Earth, which orbits the sun.

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How long is one revolution?

One revolution takes 365.25 days.

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What is the orbit?

An imaginary path of the Earth around the sun.

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What shape is Earth's orbit?

Earth's path around the sun is an ellipse.

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What causes seasons?

Earth's revolution around the sun creates seasons.

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What is a season?

A temporary period of change in climate.

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Summer Solstice

When the North Pole tilts toward the Sun.

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Winter Solstice

When the North Pole tilts away from the Sun.

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Earth's Dual Motion

The Earth revolves around the Sun as it rotates on its axis.

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Factors affecting seasons

Location and prevailing winds affect seasons.

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Philippine Location

Our country is located near the equator.

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Direct Sunlight

Receives direct heat from the sun throughout the year.

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Philippine Climate Traits

High temperature and high humidity.

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What are monsoons?

Seasonal winds.

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Northeast Monsoon (Amihan)

Called amihan; creates dry season.

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Southwest Monsoon (Habagat)

Called habagat; brings heavy rains, creating wet season.

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Monsoons and Seasons

Northeast monsoon causes dry season. Southwest monsoon causes wet season.

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What is Dry season

Characterized by cloudless and hot days; January to May.

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What is Wet Season

Characterized by rainy days with thunderstorms; June to September.

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Study Notes

  • Earth's rotation results in day and night

Motions of the Earth

  • Rotation refers to the movement of Earth on its own axis
  • Revolution is the movement of Earth around the Sun

Daily Motion

  • A single rotation of the Earth takes 24 hours
  • One Earth day is the equivalent of 24 hours

Day and Night Explained

  • The portion of Earth facing the sun experiences daylight
  • The side of Earth that is facing away from the sun experiences darkness
  • The Philippines experiences daytime when it is facing the Sun
  • The Philippines experiences night when it is turned away from the Sun

Earth's Axial Tilt

  • Earth tilts on its axis at an angle of 23.5 degrees
  • The shape of the Earth is an oblate spheroid
  • The tilt of Earth's axis causes the length of days and nights to be unequal

Hypothetical Effect of No Rotation

  • The portion of Earth facing the sun would continuously experience daylight, leading to constant warmth
  • The opposite half would remain in permanent darkness and freezing temperatures

Revolution

  • Revolution is Earth's movement around the Sun
  • The Moon revolves around the Earth, and the Earth revolves around the Sun

Annual Motion

  • One revolution of the Earth around the Sun takes 365.25 days
  • A leap year occurs every four years

The Orbit

  • The orbit is an imaginary path of Earth around the Sun
  • The Earth's orbital path is an ellipse
  • Aphelion is the point farthest from the Sun which happens on Earth on July 5th
  • Perihelion is the closest proximity to the Sun which happens on Earth on January 5th

Revolution and Seasons

  • Earth's revolution around the sun creates seasons
  • A season is a temporary period of change in climate

Solstices

  • During the summer solstice, the North Pole tilts directly toward the Sun, receiving the greatest energy
  • During the winter solstice, the North Pole is facing away from the Sun and receives the least energy

Big Idea

  • The Earth revolves around the Sun as it rotates on its axis

Dry and Wet Seasons

  • The dry season is characterized by cloudless and hot days and occurs between January and May
  • The wet season is characterized by rainy days with thunderstorms and occurs from June to September

Factors Affecting Seasons

  • Two factors affecting seasons in the Philippines are its location and the prevailing winds
  • The Philippines is located near the equator

Location of the Philippines

  • Due to the Philippines' location, it receives direct heat from the sun throughout the year
  • This results in high temperatures and high humidity

Prevailing Winds, Monsoons

  • Prevailing winds are also known as monsoons
  • Monsoons act as a seasonal wind system that lasts for months
  • The Northeast monsoon is called amihan and creates the dry season
  • The Southwest monsoon is called habagat and brings heavy rains creating the wet season
  • Northeast monsoon causes the dry season, while the southwest monsoon causes the wet season

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