ch 29.3 Flashcards
a rise or fall in the ocean surface
tide
reflects the change in appearance of the moon
moon phase
the moon directly moves between the sun and the earth
solar eclipse
the earth passes between the sun and the moon
lunar eclipse
the dark colored, flat, lava filled regions on the moons surface
Maria
a layer of dusty lunar material created by collisions between astroids
regolith
How many days does it take the moon to revolve around the Earth?
27.3 days
A complete lunar phase cycle takes 29.5 days, what is this called?
29.5 days (synodic month)
do we ever see the back side of the moon?
no
what causes the tide to rise or fall?
gravitational pull by the sun and the moon
what is the rise of sea level called?
high tide
after the sea level rises how many hours does it take for the sea level to drop?
about 6 hours
which is father away from the earth the sun or the moon?
the sun
does the moon or the sun cause a greater effect on earth’s tide?
moon
how are the sun, the moon, and the earth aligned for a spring tide?
straight line
sun earth moon
how are the sun, the moon, and the earth aligned for a neap tide?
90 degree angle
sun earth moon
what does the phase of the moon you see depend on?
the positions of the moon the sun and the earth relative to each other
when does a new moon occur?
when the moon is between the sun and earth
how many phases of the moon are there?
eight phases
what is the definition of waxing phases?
the illuminated portion of the moon that we see appears lager each night
what is the definition of waning phases?
the illuminated portion of the moon that we see becomes smaller each night
what are the moon phase names?
new moon, waxing crescent, 1st quarter, waxing gibbous, full, waning gibbous, 3rd quarter, waning crescent
where is the word month derived from?
moon
how is the sun, the moon, and the earth aligned for a solar eclipse?
sun moon earth
what is an umbra?
the darkest portion of the moons shadow
what is a penumbra?
the lightest portion of the moons shadow
how is the sun, the moon, and the earthed aligned for a lunar eclipse?
sun earth moon
how are the depressions on the moon formed?
asteroids, comets, and meteorites
are there mountains on the moon?
yes
which side of the moon is thicker?
the side facing away from earth
is the mantel of the moon a solid or a liquid?
solid
what did the clementine spacecraft do? (two things)
confirmed the thickness of the moon and
provided information on the mineral content
what did the lunar prospect do? (three things)
took photographs of the surface
confirmed the moon has a small iron rich core
confirmed the presence of water on the moon
what is the giant impact theory?
it was thought to be that a mars sized object collided with earth and sent debris out in to orbit the debris condensed forming a large mass called the moon
