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physical science 8th > chapter 12 test > Flashcards

chapter 12 test Flashcards

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1
Q

spring tides occur when what?

A

when the moon and the sun are aligned

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2
Q

tides are caused mainly by…

A

the moons gravitational uneven effect on earth

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3
Q

when do neap tides occur?

A

when the moon is in a right angle to the earth

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4
Q

maria on the moons surface were formed by…

A

volcanoes and lava flows

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5
Q

gallaleo said that the moon had round formations known as…

A

craters

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6
Q

where would you find water on the moon?

A

towards the north and south poles

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7
Q

how big is the moon?

A

a quarter of the earth: 1/4 of the diameter

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8
Q

temperature on the moons surface varies because the moon has…

A

no atmosphere

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9
Q

the earths rotation takes about (how long?) …

A

1 day or 24 hours

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10
Q

day and night are caused by…

A

earth’s rotation

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11
Q

what’s a revolution of the earth and how long does it take?

A

a revolution is: one orbit around the sun and it takes 1 year

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12
Q

why does earth have seasons?

A

because it’s tilted on its axis

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13
Q

how many degrees is the earth tilted?

A

23.5

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14
Q

because the earth is tiled the latitudes 23 1/2 degrees north, and 23 1/2 degrees south, are called what?

A

the tropics

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15
Q

the north pole is tilted toward the sun, so north america experiences what?

A

summer time

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16
Q

when does the summer solstice occur in australia?

A

december 21

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17
Q

when does an equinox occur?

A

when day and night are both 12 hours

18
Q

all objects are attracted to each other by what force?

A

gravity

19
Q

what two things determine the strength of gravity?

A

mass and distance

20
Q

what two factors keep the earth in orbit around the sun and earth in orbit around the moon?

A

velocity (due to the circular motion) & gravity

21
Q

the tendency of a moving object to keep moving is..

A

inertia

22
Q

the phase of the moon depends on what?

A

the moons potition of where it is around earth

23
Q

what’s a solar eclipse?

A

when the moon casts a shadow on the earth

24
Q

when can you get a lunar eclipse?

A

when the earth is between the moon and the sun

25
Q

what phase of the moon does a lunar eclipse occur?

A

full moon

26
Q

when does the solar eclipse occur?

A

new moon

27
Q

because the moon rotated once for each orbit, what happens?

A

we see the same side of the moon

28
Q

the amount of the lighted side of the moon you can see is the same during what two phases?

A

first quarter and third quarter

29
Q

you’re less likely to see a solar eclipse than a lunar eclipse because…

A

the earth is bigger than the moon so it creates a bigger shadow

30
Q

where can you see a solar eclipse from?

A

when you are in he location of the moons umbra or shadow

31
Q

during a lunar eclipse the moon is in the earths?

A

umbra/shadow

32
Q

the amount of matter in an object is called its?

A

mass

33
Q

if the earth was more massive than the gravity would be?

A

stronger

34
Q

the tide with the greatest distance between high and low tides is either neap or spring?

A

spring

35
Q

the moon has an average density that is less or greater than the earth?

A

less

36
Q

day and night are caused by revolution or rotation?

A

rotation

37
Q

when tou are riding in a car that stops you keep moving because of gravity or inertia?

A

inertia

38
Q

on the moon your mass or your weight is 1/6 of it on earth?

A

weight

39
Q

true or false; the south end of the earths axis is tilted toward the sun during the december equinox.

A

false

40
Q

when are tides the highest?

A

spring tides

physical science 8th (5 decks)

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