The Moon Flashcards
What is a ditch where molten lava once flowed?
Rille
What does rille mean in german?
Groove
Who studies craters?
Scientists and philosophers
How are craters caused?
By impacts
Where is water found on the moon?
At the poles inside the crater walls
Which side of the mantle is the thickest on the moon?
The far side
Which side of the moon has thicker crust?
The near side
How big is the moon compared to the Earth?
Its ¼ the size
How much less gravity is the on the moon compared to the Earth?
⅙ less gravity
When do solar eclipses occur?
New moon
When do lunar eclipses occur?
Full moon
Why do we not have eclipses every month?
The angle, orbit, and moon
What is the location when the moon is farthest from Earth?
Apogee
What is the location when the moon is closest to the Earth?
Perigee
What is the shape of the moon’s orbit?
Elliptical
How old is the moon?
4.5 byo
Why do we study the moon?
To learn about Mercury
The Mars sized object that hit Earth was named what?
Theia
What is geosynchronous?
The same side faces Earth
Who was the first man on the moon?
Armstrong
What was the spaceship that Armstrong landed in and what year was that?
Apollo 11 in 1969
What is the dark spot on the moon?
Sea of tranquility
Why is there such a variation of temperature on the moon?
There is no atmosphere
What is the axial tilt of the moon?
18.5 degrees
What is the orbital inclination to the ecliptic
5 degrees
What is the density of the moon?
3300 kg/m^3
What is the imaginary line which separated from day to night on the moon’s surface?
The terminator
What is the Procellarum?
The largest of the Maria
What is the surface temperature on the moon?
-243 degrees F
What is the rotational period of the moon?
29.5 days
What causes Earth’s spin to slow?
Tidal breaking
The highlands Age: Rock: Named after: Light or Dark:
Age: 4-4.5 byo
Rock: Granite
Named after: the mountains
Light or Dark: Light
The Maria Age: Rock: How many: Found: Named after: Light or Dark:
Age: 3 byo Rock: Basalt How many: There are 14 of them Found: on the far side Named after: Latin word for sea Light or Dark: Dark