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astronomy and atmosphere > CECA > Flashcards

CECA Flashcards

1
Q

rotation

A

an object spinning on it’s axis

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2
Q

revolution

A

an object moving around the other

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3
Q

How many rotations does earth do in 365 1/4

A

1, it creates our year

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4
Q

the suns rays are least direct near the _

A

poles

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5
Q

the earth tilts

A

23 1/2 degrees

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6
Q

The earths tilt causes

A

seasons

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7
Q

summer solsist

A

June 21, longer days, more direct rays

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8
Q

winter solsist

A

December 21, shorter days, less direct rays

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9
Q

vernal equidox

A

march 21, 12 hours daylight, 12 hours of darkness

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10
Q

autamal equidox

A

september 21, 12 hours of daylight, 12 hours of darkness

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11
Q

precession causes

A

the earth to wobble on axis

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12
Q

26,00 years from

A

Polaris to Vega and back

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13
Q

force

A

a push or pull

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14
Q

gravity

A

a force that attracts all objects toward each other

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15
Q

the strength of the force of gravity depends on

A

. the masses of the objects 2. the distance between the objects

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16
Q

mass

A

weight of an object

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17
Q

weight

A

the force of gravity on an onject

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18
Q

inertia

A

tendency of objects to resist change in motion

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19
Q

half of the moon is illuminated

A

at all times

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20
Q

inertia

A

tendency of objects to resist change in motion

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21
Q

we only see one side of the moon because

A

it revolves at the same rate that it rotates

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22
Q

the phase of the moon you see is caused by

A

the angle of the earth, moon, and sun

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23
Q

left side of the moon

A

waning

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24
Q

right side of the moon

A

waxing

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25
Q

eclipse

A

when a moon or planet blocks the other from the sun causing a shadow

26
Q

solar eclipse

A

the moon casts a shadow on the earth

27
Q

lunar eclipse

A

the earth casts a shadow on the moon

28
Q

tides

A

the rise and fall of ocean water every 12.5 hoursish

29
Q

tides are caused by

A

the pull of the moon on different parts of the earth

30
Q

tides occur

A

about 2 times a day

31
Q

spring tides

A

the sun and the moon are lined up with the earth causing really high, high tides and really low, low tides.

32
Q

neep tides

A

the sun and the moon are pulling on the earth at a right angle to each other so there is not much difference between high and low tides

33
Q

craters

A

large depressions in the surface of the moon caused by fast objects hittion it.

34
Q

maria

A

(plural for mare) the dark more flat spots on the moon caused by large basalt (lava) floods after a meteor hit the moon

35
Q

regolith

A

a layer of gray crushed rock from many meteoroids hitting the moons surface

36
Q

highlands

A

mountain ranges on the moon

37
Q

moons changes

A

very little

no atmosphere or liquid water means no weathering and erosion like the earth has.

temp. ranges from -270 at night to 253 during day.

38
Q

moons origin

A

theia hit the earth and ejected material that joined together and made the moon

39
Q

what is air made up of

A

nitrogen 78%
oxygen 21%
other 1%

40
Q

ozone

A

protects us from u.v radiation

41
Q

atmosphere

A

a thin layer of mostly gases that provides us with gases to live and protection from harmful radiation and rocks in space

42
Q

why does air have pressure

A

because it has mass

43
Q

barometer

A

measures air pressure

44
Q

density formula

A

density = mass divided by volume

45
Q

layers of atmosphere

A

troposphere
stratosphere
mesosphere
thermosphere

46
Q

pollutants

A

are the harmful substances in the air, water, and soil

47
Q

natural pollutants

A

forest fires, soil erosion, dust storms, wind carrying molds and pollen, and erupting volcanoes.

48
Q

man made pollutants

A

farming, construction, burning fossil fuels almost 1/2 of pollution comes from us

49
Q

dangerous gases

A

carbon monoxide, nitrogen oxides, sulfer oxides, sulfer oxides, ozone

50
Q

acid rain

A

nitrogen oxides and sulfer oxides combine with water in the air to form nitric acid and sulfer acid

51
Q

epa

A

environmental protection agency

52
Q

convection

A

heat rises because it is less dense than cool air

the transfer of heat from/through motion of fluid

53
Q

conduction

A

transfer of heat through objects touvhing

54
Q

radiation

A

transfer of heat through space

55
Q

convetion currents

A

in the atmosphere transfer heat and moderate temp.

56
Q

climate classification

A

climates are classified by 2 major factors

precipitation
temp.

57
Q

occluded front

A

warm air mass is caught between 2 cold air masses and forced up and creates precipatation.

58
Q

cold front

A

cold air mass moving into a warmer air mass

59
Q

stationary front

A

a warm air mass slides past a cold air mass

60
Q

warm front

A

warm air mass moving into a cold air mass

61
Q

front

A

when 2 different air masses meet

62
Q

air mass

A

a huge body of air with similar temp. and moisture from the reigion they form over.

astronomy and atmosphere (1 decks)

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