Chapter 2 - Part 2

Question 1

How many days does it take the moon to orbit around the Earth?

Answer 1

27.3 days

Question 2

How does the moon shine if it doesn’t have its own light source?

Answer 2

It reflects light from the sun

Question 3

The different appearances of the moon as it orbits the Earth

Answer 3

Phases

Question 4

Occurs when the moon is between the Earth and the Sun, the entire far side of the moon is illuminated

Answer 4

New moon

Question 5

List the phases of the moon starting from a new moon

Answer 5

1. New moon
2. Waxing crescent
3. First quarter
4. Waxing gibbous
5. Full moon
6. Waning gibbous
7. Third quarter
8. Waning crescent

Question 6

Occurs a few days after a new moon where only a sliver of the right side of the moon is illuminated

Answer 6

Waxing crescent

Question 7

Why is our view of the moon constantly changing?

Answer 7

The moon is orbiting the earth, so the amount of sunlight that reflects off of it depends on its location

Question 8

When does a new moon rise?

Answer 8

Sunrise

Question 9

When does a full moon rise?

Answer 9

Sunset

Question 10

Occurs when the moon has moved a quarter away around the earth and half of it is illuminated

Answer 10

First quarter

Question 11

Occurs after the first quarter where more than half of the right side of the moon is illuminated

Answer 11

Waxing gibbous

Question 12

Occurs when the Earth is between the Sun and moon, the entire near side of the moon is illuminated

Answer 12

New moon

Question 13

Occurs when the moon is starting to get smaller, where more than half of the left side of the moon is illuminated

Answer 13

Waning gibbous

Question 14

Occurs when the left half the moon is illuminated and the right side isn’t

Answer 14

Third quarter

Question 15

Occurs when only a sliver of the left side of the moon is illuminated

Answer 15

Waning crescent

Question 16

What is a solar month?

Answer 16

The time between one new moon and the next

Question 17

What is a sidereal month?

Answer 17

The time it takes the moon to complete one orbit around the Earth

Question 18

What is a solar month measured with respect to?

Answer 18

The stars

Question 19

What is a sidereal month measured with respect to?

Answer 19

The sun

Question 20

How long is a solar month?

Answer 20

29.53 days

Question 21

How long is a sidereal month?

Answer 21

27.32 days

Question 22

Why do we only see one side of the moon?

Answer 22

The time it takes the moon to make one revolution around the Earth is the same amount of time it takes the moon to make one rotation

Question 23

Describe the synchronous rotation of the moon

Answer 23

The amount of time for the moon’s rotation and the earth’s rotation is the same

Question 24

What is a lunar day

Answer 24

The time between one sunrise and the next as seen from the moon (24 hrs & 50 min)

Question 25

What is it called when the earth, moon, and sun line up?

Answer 25

An eclipse

Question 26

The total or partial obscuration of one celestial body by another celestial body

Answer 26

Eclipse

Question 27

Occurs when the moon passes between the sun and earth?

Answer 27

Solar eclipse

Question 28

The darker inner part of the earth's shadow

Answer 28

Umbra

Question 29

An eclipse where the sun's light is completely blocked by the moon

Answer 29

Total solar eclipse

Question 30

The lighter part of the earth's shadow

Answer 30

Penumbra

Question 31

An eclipse where the sun's light is partially blocked by the moon

Answer 31

Partial solar eclipse

Question 32

An eclipse where the sun's outer ring isn't blocked by the moon

Answer 32

Annular solar eclipse

Question 33

Why is the solar eclipses viewing area shorter than the lunar eclipses viewing area?

Answer 33

The diameter of the earth's shadow is a lot larger than the diameter of the moon's shadow

Question 34

Occurs when the moon moves through the earth's shadow

Answer 34

Lunar eclipse

Question 35

Occurs when the moon is entirely within the earth's shadow

Answer 35

Total lunar eclipse

Question 36

During a total lunar eclipse, why does the moon appear to be red?

Answer 36

The red light from the sun is bent by the earth's atmosphere and it hits the moon

Question 37

Occurs when the moon passes through the penumbra part of the earth's shadow

Answer 37

Penumbral lunar eclipse

Question 38

Occurs when the earth's shadow partially blocks the moon?

Answer 38

Partial lunar eclipse

Question 39

Why do we not have eclipses every month?

Answer 39

The moon's orbit and the earth's orbit aren't on the exact same plane

Question 40

The line where the sun's and moon's orbital planes intersect

Answer 40

The line of nodes

Question 41

The times where the line of nodes points in the direction of the sun

Answer 41

The ecliptic seasons

Question 42

What conditions need to be met in order for an eclipse to happen?

Answer 42

The sun, moon, and earth need to be aligned on the line of nodes

Question 43

When the moon is closest

Answer 43

Perigee

Question 44

When the moon is farthest

Answer 44

Apogee

Question 45

The earth rotates on it's axis and revolves around the sun

Answer 45

(Remember this)

Question 46

The plane of earth's orbit

Answer 46

The ecliptic plane