Earth And Moon

Front 1

how long does it take for the earth to rotate once

Back 1

23 hr. 56 min.

Front 2

whats the earth's tilt

Back 2

it tilts at 27.5

Front 3

in what direction does the earth rotate

Back 3

west to east

Front 4

how long does it take the earth to make a revolution

Back 4

it tkaes 365.25 days

Front 5

what is a perihelion

Back 5

the closest point in earths orbit to the sun

Front 6

what is a aphelion

Back 6

the furthest point in earths orbit form the sun

Front 7

is the earth a perfect sphere?

Back 7

no

Front 8

why is it not a perfect sphere?

Back 8

becuase is buldges out at the equator

Front 9

why does it bluge at the equator?

Back 9

centrifical force

Front 10

why do we have seasons?

Back 10

becuase the earth tilts to the sun at different times in its revolution, making the sun shine on different parts of the earth at a time.

Front 11

when is the summer solstice

Back 11

june21

Front 12

wat are things about june 21

Back 12

1. winter in the southern hem.
2. 24 hours of darkness in the south pole
3. 24 hours of light in the north
4. zenith is on 23.5 north [tropic of cancer]
5. days start getting shorter, nights longer

Front 13

when is the winter solstice

Back 13

december21

Front 14

wat are things about dec.21

Back 14

1. summer in the southern hem.
2. 24 hours of light in the south poles
3. 24 hours of dark in the north poles
4. zenith is over 23.5 south [tropic of capricorn]
5. days getting longer, nights shorter

Front 15

when is ther vernal equinox

Back 15

march21

Front 16

name things about march 21

Back 16

1. even day and night
2. aenith over the equator
3. first day of spring

Front 17

when is the atumnal equinox

Back 17

sept 21

Front 18

name things about sept21

Back 18

1. even day and night
2. zenith over equator
3. first day of autum

Front 19

how many time zones are there

Back 19

24

Front 20

how wide are each timezone

Back 20

15 degrees

Front 21

what are the metric prefixes

Back 21

kilo
hects
deca
meter
deci
centi
mili

Front 22

what do kilo hects deca meter deci centi mili mean?

Back 22

1000,100,10,1,1/10,1/100,1/1000

Front 23

wat is the metric unit used for wieght

Back 23

grams

Front 24

wat is the metric unit used for length

Back 24

meters

Front 25

wat is the metric unit used for volume

Back 25

liters

Front 26

how do u calculate your weight on the moon

Back 26

divide by 6

Front 27

wat are four features on the moons surface

Back 27

craters-curcular indentations
rillies-long vallies
marias-dark regions symbolizing bodies of water
highlands-mountainous terrain

Front 28

wat is the tempature on the moon

Back 28

130c-175c

Front 29

is there weather on the moon

Back 29

negetive

Front 30

describe the moons orbit

Back 30

it has an eliptical orbit

Front 31

define apogee

Back 31

furthest point in moons orbit from the earth

Front 32

define perigee

Back 32

closest poin in moons orbit to the earth

Front 33

ho wlong does the moons revolution take

Back 33

27.3 days

Front 34

how long does one rotation take

Back 34

27.3 days

Front 35

why do we only see one side of the moon

Back 35

becuase as the moon rorates it it also revolving

Front 36

what are the four moon theories?

Back 36

the daughter theory, sister theory, capture theory, most accepted theory

Front 37

explain the daughter thoery

Back 37

a piece of the earth was knoced off and formed a moon
FLAW: can't explain the differences in earth and moons surfaces

Front 38

explain the sister theory

Back 38

earth and moon were both formed of gas and dust
FLAW: can't explain different rock composistions

Front 39

capture theory

Back 39

a rock was pulled into earths gravity
FLAW: another object is needed to bump the rock into earths gravity, never found

Front 40

most accepted theory

Back 40

impact know large amount of earth and it was caught in earths gravity
FLAW: none

Front 41

what happened on wiht the moon in 1959

Back 41

first photographs were taken of the dark side of the moon buy luna 3

Front 42

what happened on wiht the moon in 1969

Back 42

neil armstrong landed on the moon -apollo 11
beat the soviet to it
one small step for man, one large leap for man kind

Front 43

what happened on wiht the moon in 1972

Back 43

last lunar mission apollo 17

Front 44

define gibbous

Back 44

mor than half but not all

Front 45

define waxing

Back 45

increasing

Front 46

define waning

Back 46

decreasin

Front 47

define crescent

Back 47

less than half bout not none

Front 48

wat are the eight stages of the moon in order

Back 48

1. new moon
2. waxing crescent
3. 1st quarter
4. waxing gibbous
5. full moon
6. waning gibbous
7. last quarter
8. waning crescent

Front 49

what is a lunar eclipse?

Back 49

the moon sun and earth are all lined up, the earth is in the middle, half the earth can see the eclpise cuase it would be night in half the world

Front 50

what is a solar eclipse

Back 50

the moon sun and earth are all lined up , the moon is in the middle, only a small part of the earth can see this becuase the moon has such a small shadow

Front 51

define umbra

Back 51

in an eclipse, the blackest part of the shadow casy by the earth or other body in space

Front 52

define penumbra

Back 52

in an eclipse the partail shadow cast by the earth or other body in space

Front 53

explain how a lunar cycle takes 29.5 days if its revolution takes 27.3 days

Back 53

a sideral month 27.3, a synodic month 29.5

becuase the earth contuintes its orbit and it takes an extra 2.2 days for the moon to catch up wiht the earth.