Astronomy & Earth Motions Test 2

Question 1

Star trails

Answer 1

streaks of star light on a time exposure photograph as earth rotates

Question 2

Right side of the moon is illuminated

Answer 2

when full moon is approaching

Question 3

left side of the moon is illuminated

Answer 3

after full moon

Question 4

waxing

Answer 4

new

Question 5

waning

Answer 5

old

Question 6

Blue moon

Answer 6

2nd full moon of the month

Question 7

The big bang theory

Answer 7

13.7 billion years ago all matter in the universe exploded

Question 8

The Doppler effect

Answer 8

sound going from low to high to low

Question 9

low pitch

Answer 9

long

Question 10

high pitch

Answer 10

short

Question 11

sound approaching

Answer 11

shorter –> higher pitch

Question 12

sound moving away

Answer 12

longer –> lower pitch

Question 13

earthshine

Answer 13

seeing the “dark side” of the moon * only new crescent or old crescent

Question 14

Tides

Answer 14

highest range : new moon, full moon

Question 15

What causes tides?

Answer 15

gravity of moon and sun

Question 16

Light year

Answer 16

distance light travels in one year

Question 17

Light travels at

Answer 17

186,282 miles/second

Question 18

the moon is about ____ light seconds away

Answer 18

1.2

Question 19

the sun is about ___ light minutes away

Answer 19

8.5

Question 20

1 light year takes

Answer 20

4,000 years

Question 21

our solar system is at a

Answer 21

spiral arm