Unit 7: Earth in Space Review

How long does it take for Earth to complete one full rotation on its axis, which causes day and night?

• 12 hours

• 24 hours

• 30 days

• 365 days

If Earth took longer to orbit the Sun than it does now, what would happen to the length of a year?

• A year would be shorter than 365 days.

• A year would be longer than 365 days.

• A day would be shorter than 24 hours.

• A day would be longer than 24 hours.

Between January 1 and December 31 of the same year, how many complete revolutions does Earth make around the Sun?

• Just one

• About 12

• About 30

• About 365

Which side of Earth experiences daytime due to Earth's rotation?

• The side facing away from the Sun

• The side facing the Sun

• The side facing the Moon

• The side facing away from the Moon

Why does the Moon seem to change shape over the course of a month?

• The Sun is orbiting the Moon.

• Earth is orbiting the Moon.

• The Moon is orbiting Earth.

• Earth is orbiting the Sun.

If you observe different shapes of the Moon over several nights, what does this show?

• The Moon stays the same every night.

• The Moon changes size each night.

• The Moon appears different over time.

• The Moon is only visible during the day.

After seeing a first-quarter Moon, about how long until you see another first-quarter Moon?

• One day

• One week

• One month

• One year

Which statement about stars is NOT true?

• They form patterns in the sky.

• They can be seen best at night.

• Their patterns appear in the same place every night.

• They seem to move across the sky.

Why do the Sun, Moon, and stars appear to move across the sky?

• They are following Earth's motion.

• Earth's rotation makes them seem to move.

• They move faster than Earth spins.

• Earth's rotation keeps them in one spot.

If you see a pattern of stars at 7 PM, what will it look like at 9 PM?

• The pattern will be in the same place.

• The pattern will appear to have moved across the sky.

• The stars will have moved in different directions.

• The pattern will look smaller.