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Astrology & Geology > Moon > Flashcards

Flashcards in Moon Deck (44):
1

What is the moon?

A natural satellite

2

Compare the Earth's and Moon's size

Earth: 7930 mi
Moon: 2160 mi

3

Compare the Earth's and Moon's tilt

Earth: 23.5
Moon: 7

4

Compare the Earth's and Moon's temperature

Earth: -73 to 48 C
Moon: -107 to 153 C

5

Compare the Earth's and Moon's atmosphere

Earth: Thick, mild greenhouse effect
Moon: None

6

Compare the Earth's and Moon's liquid water

Earth: At surface
Moon: Ice at poles in shadows

7

Describe the Moon's temperature

Extreme temperature
Day = 130 C
Night = -190 C

8

How did the moon form?

Formed from impact of Mars-sized "planetsimal" on Earth, debris from both objects melted together to form the moon

9

When did the moon form?

4-5 billion years ago

10

What are Rolled?

Trenchlike valleys

11

What are Highlands?

Mountains up to 7500m tall

12

How were Craters formed?

1. Meteorite impact on the moon
2. Volcanic action inside the moon

13

What is Maria?

Darkest part of lunar landscape

14

What was Maria originally thought to be?

Seas

15

How long does it take the moon to orbit the earth?

271/3 days

16

How long does it take for the moon to rotate?

27 days

17

What is a full moon?

When the moon is completely visible to us

18

What is a new moon

When the moon is completely invisible to us

19

Why does the same side of the moon always face the Earth?

The moon is also rotation

20

What is the far side of the moon like?

More craters, very few maria, thicker crust

21

Describe the full moon phase

The moon is fully illuminated

22

Describe the new moon phase?

The moon is not illuminated at all

23

Describe the waxing phases of the moon

The moon is growing in illumination

24

Describe the waning phases of the moon

The moon is shrinking in illumination

25

Describe the crescent phases of the moon

The phases where the moon is less than half illuminated

26

Describe the gibbous phases of the moon

The phases where the moon is more than half illuminated

27

Draw a diagram of the phases of the moon

Sj

28

Describe a Lunar Eclipse

1. Moon moves into the Earth's shadow
2. Happens 2 to 3 times per year
3. Lasts 4 hours

29

Describe a solar eclipse

Moon moves between Earth and Sun and casts a shadow on part of the Earth

30

What is an Umbra?

The darker part of a shadow

31

What is a Penumbra?

The lighter part of the shadow

32

What are the 3 lunar eclipses?

1. Penumbral LE
2. Partial LE
3. Total LE

33

Describe a Penumbral Lunar Eclipse

The moon passes through Earth's penumbral shadow

34

Describe a partial lunar eclipse

A portion of the moon passes through Earth's umbral shadow

35

Describe a total lunar eclipse

The entire moon passes through Earth's umbral shadow

36

What are the 3 types of solar eclipses?

1. Partial
2. Annular
3. Total

37

Describe a partial solar eclipse

Part of the sun is covered by the moon

38

Describe a annular solar eclipse

The Sun's center is covered by the moon, leaving its edges uncovered

39

Describe total solar eclipse

The Sun is completely covered by the moon

40

How does the moon cause tides?

The pull of the Moon's gravity

41

Where is high tide?

On the sides facing the moon and on the side facing away from the moon

42

Where is low tide?

On the sides of the Earth

43

How often do the tides change?

Every 12hrs, and 25 1/2 mins

44

How many high tides and low tides are there in a day?

2 each per day