29.3 Flashcards
Tide
the periodic rise and fall of sea level caused by the gravitational attraction among earth, moon and the sun.
moon phase
changing appearance of the moon as viewed from earth depending on the relative positions of the sun, the moon, and earth.
solar eclipse
occurs during the new moon, when earth enters the moons umbra and cast a shadow on the earth’s surface.
lunar eclipse
occurs during full moon, when the moon enters earths umbra and earth casts a curved shadow on the moon’s surface
maria
relatively flat, dark-colored regions on the moon’s surface
regolith
layer of debris on the moon’s surface formed by the accumulation of meteoric material
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
a synodic month
do we ever see the back side of the moon
no, we do not see the back side of the moon we only see one side
what causes a tide to rise or fall
the gravitational pull of 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 to level drop
six hours
which is farther from earth, the sun or the moon
The sun
does the moon or the sun cause a greater effect on earths tides
The Moon
how are the sun, the earth, and the moon aligned for a spring tide
For the spring tide the sun earth and moon are in a straight liner
how are the sun, the earth, and the moon aligned for neap tide?
The Sun, earth, and the moon are at a 90 degree angle.
what does the phase of the moon you see depend on
the positions of the earth, moon, and sun relative to one another
when does the new moon occur
occurs when the moon is between the earth and the sun.
how many phases of the moon out there?
8
what is the definition of waxing phases
the illuminated portion that we see appears larger each night
what is the definition of waning phases
where the illuminated portion that we see begins to appear smaller
what are the moon phase names
new, waxing crescent, 1st quarter, waxing gibbous, full, waning gibbous, 3rd quarter
what is the word month derived from
THE MOON
how is the earth, moon, and sun aligned during a solar eclipsed
First the sun, moon, then the earth
what is an umbra
Umbra is the darkest portion of the moon shadowed
what is a penumbra
The particle shadow of the moon that projected on the earth
how is the earth, moon, and sun aligned during a lunar eclipse
First the moon, then earth, and sun
how are the depressions on the moon formed
They are formed by meteorites, asteroids, and comets, which strikes the surface of the planets
are there mountains on the moon
yes
which side of the moon s thicker
The far side of the moon
is the mantle of the moon a solid or a liquid
A solid
what did the clementine spacecraft do (2 things)
It conforms the thickness of the crust and provided mineral content on the moon
what did the lunar prospector do (3 things)
Took photographs of the moons surface, Confirmed that the moon has a small, iron-rich core, and evidence that supports the presence of water-ice on the moon
what is the Giant Impact Theory
Mar-sized object collided with earth which through deb re into orbit and condensed into a large mass forming the moon
