45 terms

moon, eclipses, and ocean tides

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Terms in this set (...)

moon motions
-rotates
-revoles
rotates
the moon rotates slowly on its axis 27.3 days (meaning one day on the moon is like 27.3 days long, if relating it to a day on Earth)
revolves
the moon also revolves around the Earth once every 27.3 days (meaning one year on the moon is 27.3 days long, if relating it to a year on Earth)
will we ever see the other side of the moon
No, we will always see the same side
if the moon rotates how can we always see the same side (Why do we always see the same side of the moon)
because the moon rotates and revolves at the same rate and both move counter clockwise at the same rate, the same side of the moon always faces the earth.
if a person lived on the moon how can they be 7 days old and 7 years old at the same time
The moon rotates slowly on its axis every 27.3 days, meaning one day on the moon is 27.3 days long. The moon also revolves around the earth once every 27.3 days, meaning one year on the moon is 27.3 days long.
moon phases
8, new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, waning crescent
new moon
when the sunlight side of the moon is facing away from the Earth
waxing crescent
the portion of the moon that you can see is growing (waxing) into a creasant shape
first quarter
when half of the sunlit side of the moon is showing as it is waxing
waxing gibbous
when the moon continues to grow and 3/4 of the visible side is lit (gibbous:"bulge")
full moon
when the sun lit side of the moon is facing the Earth
waning gibbous
when the moon starts to decrease (wane) and is 3/4 visible
third quarter
when half of the sunlit side of the moon is showing as it is waning
waning crescent
the portion of the moon that you can see is decreasing (waning) into a crescent shape.
how much of the moon is lit during a full moon
half, it will never be completely lit
how do the moon phases progress
from right to left
what is one rule while drawling the moon phases
the part that you shade in is the part you can't see
true or false: there is always a moon in the sky
true
eclipse
the shadow produced when an object comes between the sun and another objet casting a shadow
types of eclispes
2, solar eclispe , solar corona
solar eclipse
when a new moon blocks the view of the sun (produces a shadow on the earth)
Solar Corona
the sun's atmosphere that is visible on the outside of the moon's edges during an eclipse
umbra
the darkest part of the moons shadow on the Earth (cone shaped)
total solar eclispe
the people in the very center of the umbra receive total darkness
penubra
the larger part of the shadow, which is less dark on the Earth
Partial solar eclispe
the people in the penumbra only can see a portion of the sun
what is the position of the sun, earth and moon during a lunar eclipse
sun Earth Moon *shadow on moon
what is the position of the sun, earth and moon during a solar eclipse
sun Moon Earth *shadow on the earth
what phase is the moon in when there is a lunar eclipse
full moon
tides
the daily rise and fall of the Earth's waters on its coastlines (in all bodies of water, but most noticeable in the ocean and large lakes)
ebb
lowest point of the day on the shoreline (low tide)
flow
highest point of the day on the shoreline (high tide)
what aren't tides affected by
-wind
-waves
how do tides happen
-the pull of the moon's gravity on the Earth's water produces "tidal bulge" on the side of the coast and furthest from the moon. The sides with the tidal bulge are having high tide and the opposite sides would be having low tide. The Earth's rotation causes two high tides and two low tides about every 25 hours. (one full cycle occurs every 12 hours and 25 minutes)

-the sun also has a gravitational pull on the Earth. Depending on the sun's position and the moons position the height of the tide will vary.
spring tide
if the sun and the moon are together, Lined up in 180 degrees there is more gravitational pull, making higher and lower tides
what phases does the moon have to be in for a spring tide
-full moon
-new moon
neap tide
if the sun and moon are perpendicular or right angles from each other, the tides are not as drastic
what phases does the moon have to be in for a neap tide
-first quarter
-third quarter
diagram of neap tide and spring tide
why does it take 24:50 for the the tides to go through 2 full cycles if the Earth rotates exactly once every 24 hours?
because the Earth rotates counter clockwise and the moon revolves around the Earth counter clockwise, but it takes the Earth 50 extra minutes to catch up with the moon's rotation (the Earth laps the moon)
what side of the moon is lit when the is waxing
right
what side of the moon is lit when the is waning
left
what is the difference between "waning" and "waxing"
waning is when the moon is getting smaller. waxing is when the moon is getting bigger
what phases of the lunar eclipse do we on Earth see half of the moon lit
-first quarter
-third quarter

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