Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Astronomy > Chapter 2 - Part 2 > Flashcards

Chapter 2 - Part 2 Flashcards

1
Q

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

A

27.3 days

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

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

A

It reflects light from the sun

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The different appearances of the moon as it orbits the Earth

A

Phases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

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

A

New moon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

List the phases of the moon starting from a new moon

A
  1. New moon
  2. Waxing crescent
  3. First quarter
  4. Waxing gibbous
  5. Full moon
  6. Waning gibbous
  7. Third quarter
  8. Waning crescent
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

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

A

Waxing crescent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Why is our view of the moon constantly changing?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

When does a new moon rise?

A

Sunrise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

When does a full moon rise?

A

Sunset

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

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

A

First quarter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

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

A

Waxing gibbous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

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

A

New moon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

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

A

Waning gibbous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

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

A

Third quarter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

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

A

Waning crescent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a solar month?

A

The time between one new moon and the next

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is a sidereal month?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is a solar month measured with respect to?

A

The stars

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is a sidereal month measured with respect to?

A

The sun

20
Q

How long is a solar month?

A

29.53 days

21
Q

How long is a sidereal month?

A

27.32 days

22
Q

Why do we only see one side of the moon?

A

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

23
Q

Describe the synchronous rotation of the moon

A

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

24
Q

What is a lunar day

A

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

25
Q

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

A

An eclipse

26
Q

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

A

Eclipse

27
Q

Occurs when the moon passes between the sun and earth?

A

Solar eclipse

28
Q

The darker inner part of the earth’s shadow

A

Umbra

29
Q

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

A

Total solar eclipse

30
Q

The lighter part of the earth’s shadow

A

Penumbra

31
Q

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

A

Partial solar eclipse

32
Q

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

A

Annular solar eclipse

33
Q

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

A

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

34
Q

Occurs when the moon moves through the earth’s shadow

A

Lunar eclipse

35
Q

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

A

Total lunar eclipse

36
Q

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

A

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

37
Q

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

A

Penumbral lunar eclipse

38
Q

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

A

Partial lunar eclipse

39
Q

Why do we not have eclipses every month?

A

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

40
Q

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

A

The line of nodes

41
Q

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

A

The ecliptic seasons

42
Q

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

A

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

43
Q

When the moon is closest

A

Perigee

44
Q

When the moon is farthest

A

Apogee

45
Q

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

A

(Remember this)

46
Q

The plane of earth’s orbit

A

The ecliptic plane

Astronomy (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions