| A | B |
|---|
| Size of the moon | mass is 1.2%of earth - diameter smaller than US |
| gravity of the moon | 1/6 of the earth |
| moon's escape velocity is low | gravity is weak |
| mass | kilogram |
| weight | Newton |
| why do we only see one side of the moon | Because the period of rotation is the same as its period of revolution |
| If you lived on the far side of the moon whould you ever have sunlight? Would you ever see the earth? | You would have sunlight but you would never see the earth. |
| an eclipse | An eclipse occurs when the shadow of one celestial body falls on another |
| lunar eclipse | When the earth comes between the sun and the moon and the shadow of the earth falls on the moon |
| solar eclipse | When the moon comes between the earth and the sun and the shadow of the moon falls on part of the earth |
| What does a solar eclipse look like? | The moon covers the sun but you can see the sun peeking out from the edges (corona) |
| Why can't you see a solar eclipse from anywhere on earth? | Because the shadow of the moon on the earth is small, so a solar eclipse can be viewed from only a few locations |
| How does the moon look during a lunar eclipse? | Red |
| proof of little atmosphere on moon | terminiator line, stars blink out |
| crater | surrounded by steep, and nearly circluar walls |
| What is closer to the earth -- the moon or the sun | The moon (384,000 km). The sun is 150 million km (or one AU) |
| How are lunar eclipses different from solar eclipses? | A lunar eclipse: the earth comes between the sun and the moon, the light around the moon is red. Solar eclipse: moon comes between the earht and the sun and the shadow of the moon falls on part of earth. the moon covers the sun and the shadow covers part of the earth |
| What are the period of rotation and revolution for the moon? | Approximately 28 days |
| Tyco crater | spectacular rays of up to 1000 miles |
| Maria | broad lowland plaines that are darker from lava |
| mountains | up to 5 miles high with steep slopes |
| rills | long narrow valleys that begin and end abruptly |
| partial eclipse | viewing eclipse ofrom the penumbra |
| annular eclipse | moon at apogee and too small to cover sun |
| Baily's beads | bright pinpoints of light caused by sunlight passing through valleys |
| diamond ring effect | last bright sparkling bead of the solar crescent |
| Solar eclipse last | up to 7.5 minutes |
| Lunar eclipse last | up to 1 hour and 40 minutes |
