22B

Question 1

Why is the moon a sphere?

Answer 1

Because of its slow rotation

Question 2

The diameter of the moon is _______ km

Answer 2

3474

Question 3

The moon has a _____, mantle, and crust.

Answer 3

Core

Question 4

How do we know about the moon’s interior?

Answer 4

Because Apollo astronauts left a seismometer there and it measures moonquakes

Question 5

True or false: the moon has almost no atmosphere

Answer 5

True

Question 6

How does the moon’s small atmosphere get replenished?

Answer 6

1. Gases from the interior

2. Gases from small particles on the surface

Question 7

Circular depressions on the moon’s surface are called _______

Answer 7

Craters

Question 8

Who first discovered the moon’s craters with a telescope?

Answer 8

Galileo

Question 9

What formed craters?

Answer 9

The impact of meteors and asteroids slamming into the moon

Question 10

How did rays around certain craters form?

Answer 10

From the material underneath what was blasted out of the crater

Question 11

Materials that are blasted out of a crater are called _______

Answer 11

Ejecta

Question 12

Lunar seas, which are large depressions in the moon, are called ______

Answer 12

Mare or Maria

Question 13

The largest mare is Mare _________

Answer 13

Imbrium

Question 14

True or false: the moon has mountains, extinct volcanoes, and valleys

Answer 14

True

Question 15

A narrow valley on the moon is called a _______

Answer 15

Rille

Question 16

True or false: the lunar seas, or mare, are broad plains of frozen ice

Answer 16

False

Question 17

_______ rilles were formed from collapsed lava tubes

Answer 17

Sinuous

Question 18

________ rilles were formed as grabens in rift valleys

Answer 18

Straight

Question 19

The moon is the earth’s only natural ________

Answer 19

Satellite

Question 20

_________ rilles formed when flood basalts in mare basins cooled and shrank away, creating gaps

Answer 20

Arcuate

Question 21

The Hadley Rille is a ______ rille

Answer 21

Sinuous