1. Earth moves in a(n) around the Sun.
a. circle
b. ellipse

2. Earth's takes place on an imaginary line called its axis.
a. rotation
b. revolution

3. The point at which the Sun reaches its greatest distance north or south
of the equator is the
a. equinox
b. solstice

4. Earth's yearly orbit around the Sun is one
a. revolution
b. rotation

5. During a
the dark side of the Moon faces Earth.
a. full Moon
b. new Moon

6. There are equal hours of daylight and nighttime during a(n)
a. solstice
b. equinox

7. The changing appearances of the Moon as seen from Earth are its
a. phases
b. maria

8. After a new moon, when more of the Moon's lighted side becomes
visible, the phases are
a. waxing
b. waning

9. When objects hit the Moon, they created craters, or
a. impact basins
b. magnetic fields

10. Dark, flat regions on the Moon are called
a. umbra
b. maria

11. During a -
the moon blocks the Sun's rays.
a. lunar eclipse
b. solar eclipse

12. Because it bulges slightly at the equator, Earth is not a perfect
a. sphere
b. ellipse