29.3 Flashcards
Periodic rise and fall in sea level caused by the gravitational attraction among earth,moon and the sun.
Tide
Change in appearance of the moon as viewed from earth, due to the relative position of earth, the sun, and the moon
moon phase
occurs when the moon passes between the sun and earth, and cast a shadow on part of earth
solar eclipse
occurs when earths shadow falls on the moon.
Lunar eclipse
Relatively flat, dark-colored regions on the moons surface.
Maria
layer of loose, ground-up rock on the lunar surface formed by the accumulation of impact material
Regolith
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 pulls by the sun and moon
What is the rise of sea level called?
high tide
After the sea level rises how many hours does it take for sea level drop?
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 earths tide?
How are the sun, the earth, and the moon aligned for a spring tide?
there in a straight line it goes sun, earth, and moon
How are the sun, the earth, and the moon aligned for a neap tide?
90 degree angle
What does the phase of the moon you see depend on?
The positions of the moon, earth, and sun relative to one another
When does a new moon occur?
the moon is between the earth and the sun
How many phases of the moon are there?
8 phases
What is the definition of waxing phase?
the illuminated portion that we see appears larger each night
What is the definition of waning phase?
What are the moon phases names?new moon, waxing cresent, 1st qarter, waxing gibbous, full moon
new moon, waxing crescent, 1st quarter, waxing gibbous, full moon, warning gibbous, 3rd quarter, waning crescent
Where is the word month derived from?
same root word as moon
How is the earth, moon, and sun aligned during a solar eclipse?
sun, moon, and earth
What is an umbra?
Where the total solar eclipse happens the darkest portion of the moons shadow non earth
What is a penumbra?
Partial solar eclipse not in the dark shadow within earth
How is the earth,moon, and sun aligned during a lunar eclipse?
earths shadow is being castes on the moon
How are the depressions on the moon formed?
by meteorites, asteroids, and comets which strike the surface
Are there mountains on the moon?
Which side of the moon is thicker?
dark side of the moon
is the mantle of the moon a solid or a liquid?
What did the clementine spacecraft do?(2 things)
it conformed the thickness on the moon.
it provided information on the mineral content of moon rock.
what did the lunar prospector do?(3 things)
- took pictures of the moon
- confirmed the moon has small iron-rich core
- collected evidence that there is presence of water-ice on the moon
What is the giant impact theory?
mars sized objects collided with earth, where debris were thrown into orbit, then condensed into a large mass forming the moon.
