PRACTICE: Earth's Motion & the Seasons

The Earth spins on an angled tilt called a(n):

• Ecliptic

• Axis

• Equator

• Revolution

Answer explanation

The earth spins on an angled tilt called an axis. The axis is an imaginary line that runs through the center of the earth from the North Pole to the South Pole. This tilt is responsible for the changing seasons and the length of daylight hours throughout the year.

Rotation of the earth is what causes_______________

• The tides

• A full moon

• Day and night

• The seasons

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

• One winter

• One day

• One summer

• One year

The Earth's revolution around the sun takes:

• One day

• One year

• One winter

• One summer

Answer explanation

The revolution of the earth takes one year because it orbits around the sun in an elliptical path. This journey around the sun takes approximately 365.25 days to complete, resulting in one full year. This revolution is responsible for the changing of seasons and the different lengths of daylight throughout the year.

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The Earth orbits around which celestial body?

• The moon

• The sun

• Venus

• Earth

Answer explanation

The earth's revolution is called an orbit because it revolves around the sun. This is known as heliocentric orbit, where the earth moves in an elliptical path around the sun due to the gravitational force between them. The sun is at the center of our solar system, and all the planets, including Earth, orbit around it.

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Which of the following happens in one year’s time?

• The sun makes one complete spin on its axis.

• Earth makes one complete spin on its axis.

• The moon makes one complete revolution around Earth.

• Earth makes one complete revolution around the sun.

Answer explanation

In one year's time, Earth makes one complete revolution around the sun. This is known as a "year" and it takes approximately 365.25 days for Earth to complete this orbit. This revolution around the sun is responsible for the changing seasons and the cycle of daylight and darkness.

What is caused by the rotation of Earth?

• Tides

• Spring and fall

• Days and nights

• Rainfall

Answer explanation

The rotation of the Earth causes the phenomenon of days and nights. As the Earth rotates on its axis, different parts of the planet are exposed to the Sun's light, creating daytime, while the opposite side experiences darkness, creating nighttime. This rotation takes approximately 24 hours to complete, resulting in the cycle of day and night that we experience on Earth.

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Because of the Earth's revolution around the sun, we have different:

• Years

• Days

• Seasons

• Months

Answer explanation

Due to the Earth's revolution around the sun, we experience different seasons. As the Earth orbits the sun, its axis is tilted, causing different parts of the planet to receive varying amounts of sunlight throughout the year.

This tilt, along with the Earth's rotation, leads to changes in temperature, weather patterns, and the length of daylight hours. These changes create the four distinct seasons: spring, summer, autumn, and winter.

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During which season are the days the longest?

• Winter

• Spring

• Fall

• Summer

Answer explanation

During the summer season, the days are the longest. This is because the Earth's axis is tilted towards the Sun during this time, causing the Sun to be higher in the sky and resulting in longer daylight hours.

In contrast, during the winter season, the Earth's axis is tilted away from the Sun, causing the Sun to be lower in the sky and resulting in shorter daylight hours. Spring and fall are transitional seasons where the length of the days gradually changes towards either summer or winter.

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NGSS.MS-ESS1-1

During which seasons are the days the shortest?

• Summer

• Winter

• Spring

• Fall

Answer explanation

In winter, the days are the shortest because the Earth's axis is tilted away from the sun. This means that the sun's rays are spread out over a larger area, resulting in less direct sunlight and shorter days. Additionally, the angle at which the sunlight hits the Earth's surface is lower, leading to less daylight hours. As a result, winter experiences shorter days compared to other seasons.

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