test 1 Flashcards

1
Q

when does an eclipse occur

A

when one object is in the shadow of another object

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

lunar eclipse

A

the moon is in earth’s shadow

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

solar eclipse

A

the moon is making a shadow on earth

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

what creates tides

A

the gravitational pull of the moon

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

spring tide

A

sun and moon pull the water in the same direction

creates higher high tides and lower low tides

occurs during new and full moons

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

neap tide

A

sun and moon pull the water in the opposite direction

creates lower high tides and higher low tides

occurs during 1st and 3rd quarter moons

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

most common theory about the moon formation is

A

GIANT IMPACT THEORY:
during the big bang the moon was created by the debris of a huge planet knocking into earth

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

order of moon phases

A

new - waxing crescent - 1st quarter - waxing gibbous - full - waning gibbous - 3rd quarter - waning crescent

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

altitude

A

degrees above horizon

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

how many degrees is the hand

A

10

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

magnitude

A

higher mag = dimmer
lower mag = brighter

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

which way do earth and moon rotate AND revolve

A

counterclockwise

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

What force holds objects in orbit?

A

gravitational pull

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

What is the cause of gravity?

A

mass

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

what is an AU

A

astronomical unit = relative distance between sun and earth

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

when to use AU

A

for WITHIN the solar system

17
Q

what is a lightyear?

A

how fast light travels in a year

18
Q

when to use lightyears

A

for OUTSIDE the solar system

19
Q

Newton’s 1st Law

A

an object in motion will stay in motion unless acted upon by an outside force

20
Q

newtons 2nd law

A

f=ma

21
Q

Newton’s 3rd Law

A

every force has an equal and opposite reaction force

22
Q

Kepler’s 1st Law

A

planets move in an elliptical matter with the sun as one focus

23
Q

Kepler’s 2nd Law

A

equal area in equal time

24
Q

Kepler’s 3rd Law

A

(period of orbit)^2 is proportional to the (distance from the sun)^3

25
Q

what doesn’t cause the change in seasons

A

the distance from sun

26
Q

Where are the sun’s rays hitting Earth during the equinoxes?

A

equinox => equator

27
Q

Where do the sun’s rays strike during the summer solstice?

A

tropic of cancer (23.5 N)

28
Q

Where do the sun’s rays strike during the winter solstice?

A

tropic of capricorn (23.5 N)