Earth, Moon & Sun Study Guide

What is the imaginary line that passes through Earth’s center and the North/South poles?

• The axis of the Earth.

• The equator.

• The prime meridian.

• The tilt of the Earth.

Rotation is the spinning of the Earth on its axis. How long does one rotation take?

• 12 hours

• 24 hours

• 48 hours

What causes us to have days and nights?

• Earth's rotation

• Gravity

• Earth's Revolution

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A revolution occurs as the Earth moves around the sun. How long does one revolution take?

• One revolution takes approximately 365.25 days.

• One revolution takes approximately 360 days.

• About 1 year

• One revolution takes about 400 days.

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What shape is the Earth's orbit around the sun?

• The Earth's orbit around the sun is an ellipse.

• The Earth's orbit around the sun is a circle.

• The Earth's orbit around the sun is a parabola.

• The Earth's orbit around the sun is a straight line.

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NGSS.MS-ESS1-1

What is the path an object takes as it revolves around another object?

• Rotation

• Revolution

• orbit

• Inertia

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The shape of Earth's orbit around the Sun (ellipse) makes the Earth closer to the Sun during parts of the year and further during others.

• True

• False

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What force keeps the Earth from flying outward into space from its present position?

• Friction

• The Sun's gravitational pull

• The Sun's gravitational push

• Normal Force

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What keeps the planets moving in a forward position?

• Friction

• The Sun's gravitational pull

• The Sun's gravitational push

• Inertia

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What two forces combined help the planets remain in a constant orbit around the Sun?

• Gravity;Inertia

• Gravity;Friction

• Push;Pull

• Energy;Inertia

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