What is the first half of the lunar month, the moon is said to be?
100
full moon
What is the phase of its cycle must the moon be for a total lunar eclipse to take place?
100
Accretion Theory
What theory states that the Earth and the moon both originally solidified from the same cloud of dust?
100
Maria
What are broad, lava-flooded plains called?
200
A measure of the amount of matter
What is mass?
200
point away
What do the cusps of a cresecent moon do?
200
Solar eclipse
How does a solar eclipse occur?
200
Capture Theory
What theory states that the earth captured a small planet by chance from an orbit around the sun?
200
Mare Imbrium ( Sea of Rains)
What is the largest mare on the moon?
300
Has too little mass
What is the reason the moon has a very thin atmosphere?
300
Harvest Moon
What is the full moon in the Northern Hemisphere that occurs around September 21-23 called?
300
A partial solar eclipse
What kind of eclipse would be seen if observed from a location within the penumbra of the moon's shadow?
300
What is the Fission Theory
What theory states that the moon was spun off from the earth while the Earth was forming?
300
Tycho
What is the spectacular rayed crater found in the moon's southern hemisphere is called?
400
Once
What is the times the moon rotates during one revoltuion around the earth?
400
What is "waning".
What is it called when as we see less of the lit part of the moon?
400
Baily's beads
What are Baily beads? Baily beads are seen just before and after totality during a solar eclipse. They are bright pinpoints of light caused by sunlight shining through valley's on the moon's limb.
400
What is the Impact Theory?
What theory states that a smaller planet struck the Earth and that the moon formed from the resulting debris?
400
Rills
What is the long, narrow valleys that start and end abruptly on the surface of the moon are?
500
384,400 km
What is the distance from the center of the moon to the center of the earth averages?
500
Waxing crescent
What is the phase called that continues through the first week of the cycle.
500
What is a "lunar eclipse"?
During this process, the moon moves through the Earth's shadow, and cannot be seen for a short time.
500
The major problem with this theory is its improbability