8.7 A. Earth's rotation and revolution.

In the summer many people enjoy going to the beach. The photograph shows a beach in Argentina, which is located in the Southern Hemisphere.

Which diagram shows the position of Earth when it is summer in Argentina?

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NGSS.MS-ESS1-1

Which of these locations on Earth experiences the least change in the number of daylight hours throughout the year?

• Equator

• North Pole

• Tropic of Cancer

• Tropic of Capricorn

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NGSS.MS-ESS1-1

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 of these changes would likely occur if the rate of Earth’s rotation on its axis increased?

• The length of the seasons would be shorter.

• The length of the seasons would be longer.

• The length of a day would be shorter.

• The length of a day would be longer.

A student is setting up a model that demonstrates the day and night cycle on Earth. The model contains a styrofoam ball with toothpicks on the top and bottom of the ball to represent the poles of the Earth. The model also contains a flashlight, pointing in the direction of the styrofoam ball, that represents the Sun. What should the student do to demonstrate the day and night cycle experienced on Earth?

• spin the Styrofoam ball

• spin the flashlight

• tilt the Styrofoam ball

• move the Styrofoam ball around the flashlight

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NGSS.MS-ESS1-1

The diagram represents the positions of the Earth and the Sun throughout one year demonstrating the seasons. Which statements are accurate about the Earth, Sun, and seasons? Select TWO correct answers.

• Point B represents North America in spring and South America in the fall.

• Point A represents North America in summer and South America in winter.

• Point A represents South America in summer and North America in winter.

• The Earth revolves around the Sun in 24 hours and has a 23.5-degree tilt.

• The Earth rotates over a period of 365 days and experiences four separate seasons.

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NGSS.MS-ESS1-1

Using the model of the Earth and Sun below, decide which of the following statements are true for Location A and Location B.

Select TWO correct answers.

• Location A and Location B are both in winter.

• Location A is experiencing day and Location B is experiencing night.

• Location A is in summer and Location B is in winter.

• Location A and Location B are both experiencing day.

• The days are longer for Location B than they are for Location A.

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NGSS.MS-ESS1-1

NGSS.MS-ESS2-6

The diagram shows the earth/sun relationship when North America is in winter. What would be different about the diagram when North America is in summer?

• North America would be tilted toward the sun.

• North America would be tilted away from the sun.

• The Earth has no tilt when North America is in summer.

• The tilt is neither toward nor away from the Sun when North America is in summer.

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NGSS.MS-ESS1-1

How long does it take the Earth to move from Point A to Point B?

• 3 months

• 6 months

• 9 months

• 12 months

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NGSS.MS-ESS1-1

During which portion of the Earth’s revolution around the Sun is the Northern Hemisphere tilted away from the sun?

• vernal equinox

• summer solstice

• autumnal equinox

• winter solstice

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NGSS.MS-ESS1-1