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Chapter 29 Flashcards

1
Q

Is round and three dimensional

A

Sphere

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2
Q

Ellipse

A

Is an elongated closed curve with two foci

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3
Q

What are some ancient fact that prove is a sphere

A

Objects fall towards the surface
The Shadow of the earth on the moon
People in different parts of the earth see different stars

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4
Q

What are two that affect gravitational pull

A

Mass and distance of an object

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5
Q

What does the magnetic field protect the earth from

A

Solar radiation

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6
Q

Which magnetic pull is located in the northern hemisphere

A

South magnetic pull

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7
Q

What what degree is earths axis tilted

A

11.7 degrees

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8
Q

What is the large scale movements where the magnetic pulls flip

A

Magnetic reversals

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9
Q

How often do magnetic reversals occur

A

200,000 years

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10
Q

Within earths magnetic field which deflects radiation

A

Magnetosphere

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11
Q

What are the scientific name of the northern and southern lights

A

Aurora borealis

Aurora Australis

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12
Q

How are the aurora lights created

A

Electrically-charged particles collide with atoms in the atmosphere and emit light

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13
Q

An area 15 degree wide in which the time is the same

A

Time zone

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14
Q

The spinning of earth on its axis, an imaginary line drawn from earths North Pole to its South Pole

A

Rotation

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15
Q

The motion of earth in an elliptical orbit around the sun

A

Revolution

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16
Q

The plane of earths orbit around the sun

A

Ecliptic

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17
Q

Earths rotational axis is perpendicular to a line drawn from the center of the earth to the center of the sun

A

Equinox

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18
Q

Occurs when earths rotational axis is tilted directly toward the sun or away from the sun

A

Solstice

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19
Q

Who devised a method of timekeeping around 3000 B.C

A

Babylonians

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20
Q

What was the symbol for degree taken from

A

The Babylonians from the sun

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21
Q

How many degrees does the earth spin in one day

A

360

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22
Q

How many hours does it take the earth to make one full rotation

A

24

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23
Q

How many degrees does the earth spin in one hour

A

15

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24
Q

What direction does the sun rise

A

East

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25
What direction does the sun set
West
26
True or false? All time zones are the exact same size
False, they are modified to fit around cities, states, and country borders, and other key sites
27
How many time zones are there in the world
24
28
Which direction do you move to add hours to the time
East
29
Which direction do you move to subtract hours from the time
West
30
How many time zones are there in the us
6
31
What are the names of the time zones
``` Atlantic/ Alaska Pacific Mountain Central Eastern Hawaiian ```
32
What is a solar day
Motion of the sun from sun at noon one day and sun at noon the next day
33
What is a sidereal day
See a certain stair over the horizon to the next day
34
What are the two main reasons for seasons
Revolution and the tilt of the axis
35
Which 2 seasons have a solstice
Winter and summer
36
Which month of s the summer solstice
June
37
Which month is the winter solstice
December
38
Which two seasons are equinox
Spring and fall
39
Which month is the spring equinox
March
40
Which month is the fall equinox
September
41
When is the longest day of the year
June 21
42
When is the shortest day of the year
December 21
43
When are the days almost 12 hours of day and 12 hours of night
Spring and fall equinox March 21 or 22 September 22 or 23
44
Is a rise or fall in the ocean surface to rise
Tide
45
Reflects the change in appearance of the moon as seen from earth
Moon phase
46
Occurs when the moon moves directly between the sun and earth and casts a shadow on earth
Solar eclipse
47
Occurs when earth passes between the sun and the moon and casts a shadow on the moon
Lunar eclipse
48
The dark-colored, flat, lava-filled regions on the moons surface
Maria
49
A layer of dusty lunar material produced by collisions between asteroids and comets and the moon
Regolith
50
How many days does it take the moon to revolve around earth
27.3
51
A complete lunar phase cycle takes 29.5 days, what is this called
Synodic month
52
Do we ever see the back side of the moon
No
53
What causes a ride to rise or fall
The gravitational pull of the sun and the moon
54
What is the rise of sea level called
High tide
55
After the sea level rises how many hours does it take for the sea level drop
6 hours
56
Which is farther from earth, the sun or the moon
Sun
57
Does the moon or the sun cause a greater effect on earth tides
Moon
58
How are the sun, the earth, and the moon aligned for a spring tide
The sun the earth and the moon are in a straight line
59
How are the sun, the earth, and the moon aligned for a neap tide
L aligned meant
60
What does the phase of the moon you see depend on
The positions of the moon, earth, and the sun relative to one another
61
When does a new moon occur
When the moon is between the earth and the sun
62
How many phases of the moon are there
8
63
What is the definition of waxing phase
The illuminated portion that we see appears larger each night
64
What is the definition of waning phases
The illumination portion that we see begins to appear smaller
65
What are the moon phases names
New, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, 3rd quarter, waning crescent
66
Where is the word month derived from
Old German word that means month
67
How is the earth, moon, and sun aligned during a solar eclipse
Sun moon earth
68
What is an umbra
Total solar eclipse
69
What is a penumbra
Partial eclipse
70
How is the earth, moon, and sun aligned during a lunar eclipse
Sun earth moon and happens at night time
71
How are the depressions on the moon formed
Meteorites, asteroids, and comets
72
Are there mountains on the moon
Yes they are formed by lava
73
Which side of the moon is thicker
Dark side
74
Is the mantle of the moon a solid or liquid
Solid
75
What did the Clementine spacecraft do (2 things)
Confirmed that the thickness the crust of the moon and provided info on the mineral content of the moon
76
What did the lunar prospector do (3 things)
Orbited the moon taking surface photos, confirmed the moon has a small iron rich core about 600 in, and supports the presence of water ice on the moon
77
What is the Giant Impact Theory
The moon formed about 4.6 billion years ago when a Mars-sized object collided with earth

physical science (10 decks)

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