Across
- 3. a piece of rock, smaller than an asteroid, that enters Earth's atmosphere and burns up
- 6. an imaginary line running through the center of the North Pole to the South Pole
- 7. the regular rise and fall of the ocean's surface, caused mostly by the moon's gravitational pull on Earth's ocean
- 8. the movement of one object in an orbit around another object
- 9. one complete rotation of Earth on its axis
Down
- 1. the time it takes a planet to revolve around the sun
- 2. a body in space that orbits a larger body
- 4. an event that occurs when one object passes into the shadow of another object
- 5. the turning of an object on an axis
- 6. a piece of rock and metal that orbits the sun