Chapter 29

2. is defined as the plane of Earth’s orbit
4. is the spinning of Earth on its axis
5. is a rise or fall in the ocean surface
10. occurs when Earth passes between the Sun and the Moon and casts a shadow on the Moon
12. is an area in which the time is the same
13. a layer of dusty lunar material produced by collisions between asteroids and comets and the Moon
14. reflects the change in appearance

1. is the motion of Earth in orbit around the Sun
3. occurs when Earth’s rotational axis is tilted directly toward the Sun
6. an elongated closed curve with two foci
7. a round three dimensional object
8. the dark-colored, flat, lava-filled regions on the Moon’s surface
9. occurs when the Moon moves directly between the Sun and Earth and casts a shadow on Earth
11. the number of daylight hours and the number of nighttime hours are nearly the same everywhere