Astronomy Unit 3 Review

Earth’s rotation takes about ______.

• 365 days

• 6 months

• 24 hours

• 1 month

One complete revolution of Earth around the sun takes about one ______.

• rotation.

• season

• year

• eclipse

Earth has seasons because ______.

• it rotates on its axis.

• the distance between Earth and the sun changes.

• its axis is tilted as it moves around the sun.

• the temperature of the sun changes.

When the north end of Earth’s axis is tilted toward the sun, North America will experience ______.

• more indirect rays and shorter days.

• more indirect rays and longer days.

• more direct rays and shorter days.

• more direct rays and longer days.

The phase of the moon you see depends on ______.

• where you are on Earth’s surface.

• how much of the sunlit side of the moon faces Earth.

• how much of the moon’s surface is lit by the sun.

• whether or not an eclipse is occurring.

Galileo saw much of the moon's surface is covered in round pits called _____

• highlands

• seas

• craters

• Maria

Scientists think the moon was formed when _______

• a large object struck Earth, and ejected material from the collision combined

• gravitational forces attracted a moon formed elsewhere in space

• meteoroids collected and solidified within the pull of Earth's gravity

• gases from Earth escaped from the atmosphere and condensed in space

An equinox occurs when ____

• neither end of the Earth's axis is tilted toward or away from the sun

• the north end of Earth's axis is tilted away from the sun

• the north end of Earths axis is tilted toward the sun

• Earth;s axis is parallel to the Sun's ray

The moon appears to be cut in half during _____

• new moon and full moon phase

• new moon and first quarter phase

• first quarter and third quarter phase

• full moon and third quarter phase

All objects are attracted to each other by the force of _____

• weight

• mass

• inertia

• gravity