Exam Week

Front 1

solar eclipse

Back 1

the shadow of the moon falls on the earth

Front 2

umbra

Back 2

the darkest part of a shadow in an eclipse

Front 3

corona

Back 3

during a solar eclipse only this part of the sun is visible

Front 4

luner eclipse

Back 4

the shadow of the earth falls upon the moon

Front 5

partial eclipse

Back 5

this is the type of eclipse you will expierience if you happen to be in the range of the penumbra

Front 6

total eclipse

Back 6

this is the type of eclips you will expierience if you are in the rage of the umbra

Front 7

penumbra

Back 7

the broader outer part of the shadow in an eclipse

Front 8

neap tides

Back 8

these tides are formed when the earth sun and moon form a right angle so it occurs in a 1st or 3rd quarter

Front 9

tide

Back 9

the rise and fall of the earths waters considering the gravitational pull

Front 10

spring tide

Back 10

these tides are formed when the earth sun and moon are aligned

Front 11

high tide

Back 11

the bulge of earths water towards the moon

Front 12

tidal range

Back 12

the difference between a high tide and a low tide

Front 13

low tide

Back 13

the tide which occurs between two high tiddes

Front 14

regolith

Back 14

fine dust and rocky bits that cover the moons surface

Front 15

rotation

Back 15

one complete spin of a celestial body on its axis

Front 16

maria

Back 16

the areas on the moon that are known as waterless "seas" that are actually made of volcanic rock

Front 17

revolution

Back 17

the leangth of time it takes for one celestial body to completely circle around another

Front 18

gravity

Back 18

the force that causes celestial bodies to remain in orbit to one another

Front 19

the moon is aligned with the sun and the earth, moon being in the middle

Back 19

new moon

Front 20

the moon sun and earth are forming a 90* angle so the side of the moon facing the earth is half dark and half bright the visible part of the moon will be getting smaller as it moves towards the new moon phase

Back 20

3rd quarter

Front 21

part of the moon will be getting smaller as it moves towards the new moon phase

Back 21

waning cresent

Front 22

less than a quarter of the moon is visible and the visible part is getting smaller as it movestoward the new moon phase

Back 22

waning cresent

Front 23

spring tides occur during a _________ moon

Back 23

full and new

Front 24

spring tides occur how many times a month?

Back 24

two

Front 25

how many days is a luner month?

Back 25

28

Front 26

neap tides occur during a __________ moon

Back 26

1st and 3rd quarter

Front 27

the moon is approximately _______ the size of the earth

Back 27

1/4

Front 28

the landscape of the moon is covered with craters because of:

Back 28

its lack of atmosphere

Front 29

how long does a luner eclipse last?

Back 29

1-2 hours

Front 30

a luner eclipse occurs during a __________ moon

Back 30

full

Front 31

how long does a solar eclipse last?

Back 31

2 minutes

Front 32

the earth has about ____ times the gravity on the moon

Back 32

six

Front 33

the temperature on the moon is

Back 33

extremely cold or hot

Front 34

why do we see different phases of the moon from earth?

Back 34

because the moon orbits and it turns so we see different phase son different nights

Front 35

how much of the moon is lit no matter what phase we see?

Back 35

the part of the moon that is getting light from the sun, is the side we see

Front 36

why do we only see one side of the moon?

Back 36

the moon is orbiting so which ever way it tuns is the side we see

Front 37

how long is day/night on the moon?

Back 37

29 and a half days

Front 38

how long does it take for the earth to make an orbit around the sun

Back 38

365 1/4

Front 39

it takes the earth how many hours for earth to make one rotation?

Back 39

24 hrs

Front 40

the longest day and shortest nigh tof the year in the northern hemisphereis called the ___________.

Back 40

summer solctice

Front 41

it ocurs in the month of _________.

Back 41

june

Front 42

the shortest day and longest night of the year in the northern hemisphereis called __________

Back 42

winter solctice

Front 43

it occurs in the month of ____________.

Back 43

december

Front 44

periods of equal daylight and nighttime hours occur twice a year we call these the ___________ and __________.

Back 44

vernal and autumnal equinox

Front 45

how many degrees is the earth tilted on its axis?

Back 45

23 1/2*

Front 46

why do we have a leap year every for years?

Back 46

the 1/4 of a day adds up to one whole day on february 29th.

Front 47

relatively cooler areas on the sun that look darker than other areas on the sun

Back 47

sunspots

Front 48

sudden increases in brightness of the cromosphere

Back 48

solar flares

Front 49

fingers of flame which are surging gasses that rise from the suns surface and shoot outward

Back 49

prominences

Front 50

the area of the sun where heat and light are produced by nuclear fusion reactions

Back 50

core

Front 51

the name givin to the visible part of the sun

Back 51

photosphere

Front 52

the outer atosphere of the sun and is visible from earth only during eclipses

Back 52

corona

Front 53

energy from the reactions in the core flow here and then into the convection zones

Back 53

radiative zone

Front 54

the place where waves have no streangth to keep moving forward. they churn around and heat travels by convection

Back 54

convection zones

Front 55

the aurora borealis is caused by what?

Back 55

solar flares

Front 56

the nuclear reactions that occur in the core of the sun caused by hydrogyn changing to _________.

Back 56

helium

Front 57

the temperature at the center of the sun is _______ compared to the suns surface.

Back 57

higher

Front 58

it takes how long for the suns light to reach earths.

Back 58

8 minutes

Front 59

the denstity of the sun at the center is ________ than the density of water

Back 59

greater

Front 60

the present composition of the sun is mostly what?

Back 60

hydrogyn