8.7A Seasons

The diagram shows Earth in its orbit around the sun when very little light is visible at Earth's South Pole. Which statement is true when Earth is in the position shown?

• It is August in the northern hemisphere. It is April in the southern hemisphere.

• It is summer in the northern hemisphere. It is winter in the southern hemisphere.

• The number of hours of daylight is greater in the Southern Hemisphere than in the Northern Hemisphere.

• Spring begins earlier in the year in the Southern hemisphere than it does in the Northern hemisphere.

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NGSS.MS-ESS1-1

Students make a model using a globe and a flashlight. Which answer choice best explains the change from daytime to nighttime on Earth?

• The Sun stops sending light to Earth at night.

• Earth moves farther away from the Sun at night.

• The tilt of the Earth causes less light to reach the Earth at night.

• Earth rotates and causes different parts of the Earth to experience night.

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NGSS.MS-ESS1-1

The beginning of autumn in North American is in September, but the beginning of autumn in South America is in March. The diagram shows a picture of the Earth, the sun, and the moon on one day in September and another in March. Why does autumn start in different months of the year in North America and South America?

• Earth's orbit around the sun is not a perfect circle.

• North America has a larger landmass than South America.

• The moon has a greater pull on South America than North America.

• Earth's axis has a 23.5 degree tilt.

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NGSS.MS-ESS1-1

Students in a science class in Marfa, Texas, made a poster with a diagram to represent seasonal change in the Northern hemisphere. Which statement best describes conditions for Earth at position 1 in the diagram?

• There are an equal number of hours of daylight and nighttime in the Northern hemisphere, and the north pole is tilted away from the Sun.

• The Northern hemisphere has the fewest hours of daylight, and the Earth's axis does not tilt at this position.

• There are an equal number of daylight and nighttime hours in this position because the Earth is not tilted in this position.

• The Northern hemisphere has the fewest hours of daylight, and the north pole is tilted away from the Sun.

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NGSS.MS-ESS1-1

The model shows Earth is several positions relative to the sun. In which position is it winter in North America?

• Position 1, because North America receives the most sun.

• Position 2, because North America is tilted toward the sun.

• Position 3, because North America is parallel to the sun.

• Position 4, because North America is tilted away from the sun.

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NGSS.MS-ESS1-1

A student wants to use a spinning basketball to model the day-and-night cycle on Earth. What should the student do in order to best model the cause of the day-and-night cycle?

• Spin the ball in different directions

• Tilt the ball while it is spinning

• Paint one half of the ball black and the other half white

• Shine a bright light on the side of the ball

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NGSS.MS-ESS1-1

A student draws the model shown below. Which of these best compares the conditions at Location X and Location Y?

• It is day at Location X and night at Location Y

• It is winter at Location X and summer at Location Y

• There are more hours of daylight at Location X than at Location Y

• The moon is brighter when viewed from Location X than when viewed from Location Y

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NGSS.MS-ESS1-1

The diagram below shows four positions in Earth's orbit around the sun. The Northern hemisphere experiences the beginning of spring when Earth is in-

• Position 1

• Position 2

• Position 3

• Position 4

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Earth would not have seasons if it-

• no longer tilted on its axis

• stopped rotating on its axis

• took an additional month to orbit the sun

• revolved around the sun in the opposite direction

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NGSS.MS-ESS1-1

Which season is taking place in the Northern Hemisphere in Position 2?

• Winter
• Spring
• Summer
• Fall

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NGSS.MS-ESS1-1