Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

physical science > 29 > Flashcards

29 Flashcards

1
Q

29.1

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what are two factors that effect gravitational strength

A

mass and distance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

which diameter of earth is longer

A

equater

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what does the magnetic field protect earth from

A

harmful radiation from the sun

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

the south magnetic pole is located in which hemisphere

A

northern hemisphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what degree is earths axis tilted at

A

11.7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

do the magnetic poles reverse

A

yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what are large scale reversals called

A

magnetic reversals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

how often does the magnetic reversals occur

A

200,000 years

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

how long ago was the last magnetic reversal

A

780,000 years

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what part of magnetic field deflects harmful radiation from the sun

A

magnetosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the northern and southern lights called

A

northern- aurora borealis

southern- aurora australis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

how are the auroras created

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

elipse

A

elongated, closed curve with two foci

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

in which month is earth closest to the sun

A

January 147 million km away

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what month is earth farthest from the sun

A

July 152 million km away

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

29.2

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

time zone

A

an area 15* wide in which the time is the same

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

rotation

A

the spinning of Earth on its axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

revolution

A

the motion of earth in an elliptical orbit around the sun

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

ecliptic

A

defined as the plane of earths orbit around the sun

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

solstice

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

equinox

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

who devised a method of timekeeping around 3000 B.C

A

babylonians

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
what was the symbol for degree taken from
was the babylonian symbol for the sun
26
how many degrees does the earth spin in one day
360
27
how many hours does it take the earth to make one full rotation
24
28
how many hours does it take the earth to make one full rotation
29
how many degrees does the earth spin in one hour
15
30
what direction does the sun rise
east
31
what direction does the sun set
west
32
all time zones are the exact same size t or f
false, they are modified to fit around cities, states, and country borders, and other key sites
33
how many time zones are there in the world
24
34
which direction do you move to add hours to the time
east
35
which direction do you move to subtract hours from
west
36
how many time zones are in the united states
six
37
what are the names of the time sones
mountain daylight
38
what is a solar day
full rotation from noon to noon
39
what is a sidereal day
full night rotation for star to star
40
what are the two main reasons for seasons
tilt of earth and revolution
41
which 2 seasons have a solstice
42
which month is the summer solstice
43
which month is the winter solstice
44
which two seasons are equnioxes
45
which month is the spring equriox
46
Tide
A rise or fall in the ocean surface
47
Moon phase
Change in appearance of the moon as viewed from earth, due to the relative positions of earth the sun and the moon
48
Solar eclipse
Occurs when the moon passes between the sun and earth and casts a shadow on part of earth
49
Lunar eclipse
Occurs when earths shadow falls on the moon
50
Maria
Relatively flat dark colored regions on the moon’s surface
51
Regolith
Layer of loose ground up rock on the lunar surface formed by the accumulation of impact material
52
How many days does it take the moon to revolve around earth
27.3
53
A complete lunar phase cycle takes 29.5 days, what is this called
Synodic month
54
Do we ever see the back side of the moon
No
55
What causes a tide to rise or fall
Gravitational pull of the sun and moon
56
What is the rise of sea level called
High tide
57
After the sea level rises how many hours does it take for the sea level drop
About 6 hours
58
Which is farther from earth, the sun or the moon
Sun
59
Does the moon or the sun cause a greater effect on earths tides
Moon
60
How are the sun, the earth, and the moon aligned for a spring tide
Sun>earth>moon
61
How are the sun, the earth, and the moon aligned for a neap tide
Sun>earth>90* moon
62
What does the phase of the moon you see depend on
Depends on the positions of the moon, earth, and sun relative to one another
63
When does a new moon occur
When the moon is between earth and the sun
64
How many phases of the moon are there
8
65
What is the definition of waxing phases
66
What is the definition of waning phases
67
What are the moon phase names
- new - waxing crescent - 1st quarter - waxing gibbous - full - waning gibbous - 3rd quarter - waning crescent
68
Where is the word month derived from
69
How is the earth, moon, and sun aligned during a solar eclipse
70
What is an umbra
Where the total eclipse happens
71
What is a penumbra
Partial solar eclipse
72
How is the earth, moon, and sun aligned during a lunar eclipse
73
How are the depressions on the moon formed
74
Are there mountains on the moon
75
Which side of the moon is thicker
76
Is the mantle of the moon a solid or a liquid
77
What did the Clementine spacecraft do
It confirmed the thickness of the crust on the moon and it provided information on the material content of moon rocks
78
What sis the Lunar Prospector do
Took pictures of moons surface, confirmed the moon has a small iron rich core, evidence that there is water on the moon
79
What is the Giant Impact Theory
They think a Mars sized object collided on earth where debris was thrown into orbit which condensed into a large mass forming the moon

physical science (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions