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Earth Science > Topic 4 (Moon's effects on Earth) > Flashcards

Topic 4 (Moon's effects on Earth) Flashcards

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1
Q

If the earth rotated north to south the stars would appear to set…

A

Set north

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2
Q

How would the sky look like after 3-hour exposure photograph if the earth did not rotate?

A

The stars would be stationary

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3
Q

After 3 hours how many degrees do the stars move

A

45 degrees

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4
Q

Does polaris move in the night sky?

A

no

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5
Q

Explain why most stars seem to move from east to west in the night sky in new york state

A

Earth rotates from west to east

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6
Q

The star Sirius is observed in the evening sky during the month of January. After 4 hours Sirius will appear to have moved how many degrees

A

60 degrees

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7
Q

on december 21 at which latitude will the observer find the sun directly over head?

A

23.5 degrees South

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8
Q

The sun’s apparent daily movement is caused by…

A

earths rotation on its axis

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9
Q

At which location would the sun produce an angle of 23.5 relative to an observers head at noon june 21

A

90 degrees north or 43 degrees south

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10
Q

At 40*N latitude, for how many days a year is the sun direcly over head at noon

A

0 days

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11
Q

In new york State, to see the sun at noon, one would look

A

South

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12
Q

In New York state when the sun is 23.5 degrees up in the sky, what month is it (most likely)

A

December

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13
Q

To a person located 43 degrees North latitude the sun appear to rise due east on

A

March 21

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14
Q

From september 21 to december 20 in the united states, the direction the sun sets is

A

Moves from west towards south

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15
Q

Which motion causes the apperant rising and setting of the moon each day as seen from a location in new york state

A

Earth rotating on its axis

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16
Q

As earth revolves in orbit from its january position to its position in july, the angle between its axis and orbital plane will…

A

Remain the same

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17
Q

As a Foucault pendulum swings for 6 hours it will…

A

Appear to change positions due to earths rotation

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18
Q

How long is the time between2 full moons?

A

29.5 days

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19
Q

When we can see little of the moon, but it is getting larger each day, what phase is it in?

A

Cresent

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20
Q

High tides occor when…

A

The sun moon and earth are alligned

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21
Q

The Coriolis effect provides evidence that the earth

A

Rotates in its axis

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22
Q

Why can some stars only be seen in the summer?

A

The earth revolves around the sun, blocking the view of those stars

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23
Q

To an observer on earth, the planet Venus does not appear at one fixed point, because…

A

Venus rotates around the sun, as well as earth

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24
Q

The new moon phase occors when the moon is positioned between Earth and the Sun. However, these positions don’t always cause a Solar Eclipse because…

A

The moon’s orbit is tilted 5*

25
Q

The moon appears to rise ____ minutes later each day

A

50

26
Q

The moon shifts _____ each day

A

East ward

27
Q

What is the shape of the sun’s apparent path in the sky?

A

an arc

28
Q

Where does the sun rise in the spring

A

Due or exactly east

29
Q

Where does the sun set in the Fall

A

Due or exactly West

30
Q

Where does the sun rise and set in the summer?

A

The sun rises North of East, and sets in North west

31
Q

Where does the sun rise and set in the winter?

A

The sun rises South of East, and sets South of West

32
Q

At which latitudes can the sun be directly over head at noon

A

Between the Latitudes 23.5S- 23.5N

33
Q

What is a Geocentric Model

A

It is a model that early cultures believed in. The earth was in the middle of the solar system, and everything else orbited around it

34
Q

What model did early cultures believe in?

A

Geocentric Model

35
Q

How did other planets move in the Geocentric model?

A

They would orbit the earth, but they would do little circles in their orbit

36
Q

What is the Heliocentric Model?

A

The most modern model about the solar system, that shows that The moon rotates around the earth, and the earth rotates around the sun, just like all the other planets

37
Q

Could early Heliocentric models predict the movements of planets? Why?

A

No, because they thought that orbits wwere circles, but they actually are ellipses

38
Q

Earth’s axis is tilted ____ degrees from its line perpendicular to the plane of orbit of the sun

A

23.5*

39
Q

Does earth axis tilt as it rotates the sun?

A

It stays tilted 23.5 degrees as it revolves around the sun

40
Q

Does a Foucault Pendulum change in a predictable way? Why?

A

Yes, because the earth rotates on its axis in a predictable way as well.

41
Q

Does the Pendulum change its direction in space?

A

No, it only appears to change for observer on earth

42
Q

What is the Coriolis effect?

A

The tendency that all particles coming towards earth will deflect or curve away, from a straight-line path. This happens because the earth is rotating

43
Q

How many degrees a day does the earth move

A

1* a day

44
Q

How many times a day does the sun reach its highest point in the sky?

A

Once a day (Noon)

45
Q

How many time-zones are there?

A

24 separate time zones

46
Q

How big are the time-zone areas

A

15* wide (east to west)

47
Q

If the earth did not revolve how long would it take for the moon to revolve around the earth

A

27.5 days

48
Q

Do we see different sides of the moon?

A

No

49
Q

How long does it take for the moon to make a full rotation?

A

27.5 days

50
Q

The gravitation between the earth, moon, and sun cause

A

tides (rise and fall of the ocean)

51
Q

Which places have the highest tides?

A

The place where the moon is facing and the place opposite to it

52
Q

The ideal timing between high and low tides are…

A

12 hours and 25 min

53
Q

Define eclipse

A

when one celestial object gets into the shadow of another object

54
Q

What is a Lunar eclipse?

A

When the moon goes into the earths shadow

55
Q

What is a Solar Eclipse?

A

When the moon blocks the view of the sun

56
Q

Are Solar Eclipses rare?

A

yes, they only happen once every 200 years

57
Q

a Lunar Eclipse can last up to…

A

100 minutes

58
Q

A Solar Eclipse can last up to…

A

7.5 minutes

Earth Science (4 decks)

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