Unit 6 lesson 2 What Are Moon Phases? G4

Earth is a planet in the solar system. A planet can have one or more moons. What is another word that means the same as moon?

• A. asteroid

• B. comet

• C. satellite

• D. star

The picture below shows one of the phases of the moon.

Which phase does the picture show?

• A. crescent

• B. new moon

• C. first quarter

• D. third quarter

The picture below shows one of the phases of the moon.

What will the next phase be?

• A. new moon

• B. first quarter

• C. third quarter

• D. full moon

The same side of the moon always faces Earth. Why is this?

• A. Half the moon faces the sun.

• B. The moon does not rotate as Earth does.

• C. The moon’s rotation and orbit around Earth take the same amount of time.

• D. Earth blocks part of the sunlight that would shine on the moon’s surface.

Kashvi likes to look out the window at the moon. She observes that it seems to change every week. Which sentence best explains why this happens?

• A. The moon moves between Earth and the sun.

• B. The moon rotates only once in about a month.

• C. The same side of the moon always faces Earth.

• D. The amount of the lighted part of the moon that faces Earth changes.

Which set of pictures shows the correct order of moon phases?

• A

• B

• C

• D

Emily saw the moon one night. It looked like the picture below.

One week later, why did the moon look larger?

• A. The moon became larger.

• B. The moon became brighter.

• C. Earth and the moon moved closer together.

• D. Emily could see more of the side of the moon that was lighted.

How long does the moon take to revolve once around Earth?

• A. about as long as Earth’s seasons

• B. about as long as one rotation of Earth

• C. about as long as one rotation of the moon

• D. about as long as one revolution of Earth around the sun

The picture below shows the moon in several positions around Earth.

Which position would let a person on Earth see a new moon?

• A. 1

• B. 2

• C. 3

• D. 4

The picture below shows the sun, the moon, and Earth.

Which moon phase would someone on Earth see?

• A. full moon

• B. new moon

• C. last quarter

• D. first quarter