29.3 Flashcards
how many days does it take the moon to revolve around earth?
27.3 days
a complete lunar phase cycle takes 29.5 days what is this called?
synodic month
do we ever see the back side of the moon?
no
what causes a tide to rise or fall?
gravitational pull by sun and moon
what is the rise of the sea level called?
high tide
after the sea level rises how many hours does it take for the sea level drop?
about 6 hours
which is farther from earth, the sun or the moon?
the sun
does the moon or the sun cause a greater effect on earth’s tides?
the moon
how are the sun,moon, and earth aligned for a spring tide?
straight line
how are the sun earth and moon aligned for a neap tide?
90 degree angle
what does the phase of the moon you see depend on?
when does a new moon occur?
moon is between sun and earth
how many phases of the moon are there?
8
what is the definition of waxing phases?
the illumated portion that we see appears larger each night
what is the definition of waning phases?
illuminated portion of moon become less each night
what are the moon phases names?
new moon waxing crescent first quarter waxing gibbous full warning gibbous 3rd quarter waning crescent
where is the word month derived from?
moon
how is the earth moon and sun aligned during the solar eclipse?
moon moves directly between the sun and earth
how is an umbra?
darkest portion of the moon’s shadow
what is a penumbra?
how is the earth moon and sun aligned during the lunar eclipse?
how are the depressions on the moon formed?
are there mountains on the moon?
which side of the moon is thicker?
what did the clemetine do?
comfirmed crust on sidesfacing earht, provided info on mineral content
what did lunar prospector do?
took photographs of surface, confirmed moon had small iron-rich core, prensence of ice-water on moon
what is the giant impact theory?
mars size object collide with earth sending debris out into orbit, debris condensed creating large mass, whoch is moon
