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Reviewer > Earth Science: 1st Lesson > Flashcards

Earth Science: 1st Lesson Flashcards

1
Q

What are the 4 Major Spheres?

A
  • Geosphere
  • Biosphere
  • Hydrosphere
  • Atmosphere
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2
Q

What is the age of the earth?

A

4.5 Billion Years Old

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3
Q

What is the axial tilt of the earth?

A

23.5 Degrees

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4
Q

What is the amount of light reflected of the earth?

A

36%

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5
Q

What is the diameter of the earth?

A

7926.6 Miles

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6
Q

What is the distance of earth from the sun?

A

93 Million Miles

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7
Q

What is the orbit of the earth?

A

Elliptical

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8
Q

What is the shape of the earth?

A

Oblate Spheroid

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9
Q

What is the revolution of the earth?

A

365 Days (66,600 mile/hour)

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10
Q

What is the rotation of the earth?

A

24 Hours (counterclockwise)

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11
Q

What is the precession of the earth?

A

Wobbles

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12
Q

How many effects of precession are there?

A

2

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13
Q

What is the 1st effect of precession?

A

tropical year is short by 20 minutes than actual time to complete one revolution

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14
Q

Tropical year is short by __ minutes than actual time to complete one revolution

A

20

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15
Q

What is called the true year?

A

Sidereal Year

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16
Q

What do you call the year correlated with seasons?

A

Tropical Year

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17
Q

What is the 2nd effect of precession?

A

vertical rays of sun briefly cross equator before one revolution is completed

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18
Q

How many days in tropical year?

A

365.24 Days

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19
Q

How many days in common year?

A

365 Days

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20
Q

How many days in leap year?

A

366 Days

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21
Q

One complete orbit around the sun

A

Tropical Year

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22
Q

-1/4 day short of complete orbit

A

Common Year

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23
Q

+3/4 day over complete orbit

A

Leap Year

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24
Q

366 days equals?

A

+3/4 day over complete orbit

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25
Q

365 days equals?

A

-1/4 days short of complete orbit

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26
Q

365.24 days equals?

A

one complete orbit around sun

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27
Q

What does the part facing the sun receive?

A

Vertical Rays

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28
Q

Those that curve away from the sun receives what?

A

Slanting Rays

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29
Q

What do you call the unequal distribution of heat?

A

Solar Radiation

30
Q

What is the cause of unequal distribution of heat or solar radiation?

A

axial tilt of earth

31
Q

Axis of earth tilted towards sun

32
Q

Vertical rays reach tropic of cancer

33
Q

At noon, sun is directly overhead

34
Q

24-hour daylight in Arctic Circle

35
Q

Summer in N. Hemisphere

36
Q

Days are longer than nights

37
Q

Vertical rays of sun sweep over equator

38
Q

Autumn in N. Hemisphere

39
Q

Spring in S. Hemisphere

40
Q

Fall equinox

41
Q

What do you call the equal length of day and night

A

Fall Equinox

42
Q

N. Hemisphere tilted away from sun

43
Q

Vertical rays reach tropic of cancer

44
Q

Winter in N. Hemisphere

45
Q

Summer in S. Hemisphere

46
Q

“Accretion – Release of heat from gravity – Cool-off – Denser materials sink in the core”

A

Formation of the Earth

47
Q

Formation of the Earth

A

“Accretion – Release of heat from gravity – Cool-off – Denser materials sink in the core”

48
Q

When was earth formed?

A

4.54 billion years ago

49
Q

How is earth formed?

A

accretion of rotating disk of dust and gas

50
Q

What are the layers of the earth?

A
  1. Crust
  2. Mantle
  3. Outer Core
  4. Inner Core
51
Q

Thinnest and outermost layer

52
Q

What are the 2 layers of crust?

A
  • Continental Crust
  • Oceanic Crust
53
Q

Layer of crust that is granitic?

A

Continental Crust

54
Q

Layer of crust that is basaltic?

A

Oceanic Crust

55
Q

What is the upper layer of crust?

A

Continental Crust

56
Q

What is the lower and denser layer of crust?

A

Oceanic Crust

57
Q

Region between crust and mantle

A

Mohorovicic Discontinuity

58
Q

Found beneath crust

59
Q

It comprises 83% of the earth’s volume

60
Q

Its 2,900 km thick

61
Q

How many layers of mantle are there?

62
Q

What are the 2 layers of mantle?

A
  • Upper mantle
  • Lower mantle
63
Q

Mantle that has higher pressure and denser

A

Lower Mantle

64
Q

What do you call a weak and highly viscous layer that causes tectonic plates to move?

A

Asthenosphere

65
Q

At a convergent boundary, convection currents point ______ and roll _____ ________

A

point inward and roll plates together

66
Q

Molten liquid based on seismic data and magnetic strength

A

Outer Core

67
Q

Elements present in outer core are?

A

Iron and Nickel

68
Q

It creates magnetism

A

Iron and Nickel

69
Q

Made up of solid iron and nickel due to pressure freezing

A

Inner Core

70
Q

Responsible for earth’s magnetic field

A

Inner Core

Reviewer (12 decks)

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