Seasonal Patterns and Earth's Orbit

One complete revolution of Earth around the sun takes about

• one rotation.
• one season.
• one year.
• one eclipse.

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Earth has seasons because

• it rotates on its axis.
• its axis is tilted as it revolves around the sun.
• the distance between Earth and the sun changes.
• the temperature of the sun changes.

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In the Northern Hemisphere, the summer solstice occurs when the sun is

• directly over the equator.

• shining directly over the Tropic of Capricorn, the point farthest south it will ever be.
• closest to Earth.
• shining directly over the Tropic of Cancer, the point farthest north it will ever be.

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The Earth's orbit around the Sun is in the shape of a/an

• circle.
• eclipse.
• sphere.
• ellipse.

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We experience this season when the Northern Hemisphere is tilted away from the Sun?

• spring
• summer
• fall
• winter

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Earth's rotation takes about

• 365 days.
• 6 months.
• 24 hours.
• 1 month.

Day and night are caused by

• the tilt of Earth's axis.
• Earth's revolution around the sun.
• eclipses.
• Earth's rotation on its axis.

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An equinox occurs when

• neither hemisphere is tilted toward or away from the sun.
• the Northern Hemisphere is tilted away from the sun.
• the Northern Hemisphere is tilted toward the sun.
• Earth's axis is parallel to the sun's rays.

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NGSS.MS-ESS1-1

When we are experiencing the autumnal equinox in the Northern Hemisphere, what season is the Southern Hemisphere experiencing?

• spring
• summer
• fall
• winter

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The times when daytime and night time are of equal length (both 12 hours long) are called

• the summer and winter solstice.
• the summer and winter equinox.
• the spring and fall solstice.
• the spring and fall equinox.

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NGSS.MS-ESS1-1