Across
- 2. HUmans live on....
- 4. repeating path that one object in space takes around another one.
- 5. the dark shape made when something blocks light
- 7. the space around the earth which you can see when you stand outside and look upward.
- 8. planets exist in...
- 9. the time between dusk and dawn when there is no sunlight
Down
- 1. a form of energy that moves in straight lines
- 2. happens rarely
- 3. a large natural object that orbits, or travels around, Earth
- 6. one of the seven twenty-four hour periods of time in a week.
- 7. A large star that the earth evolves around
- 8. balls of hot, explosive gas that make their own light and heat