Across
- 1. thin layer of gases that envelop Earth.
- 3. average weather conditions in a region or an area over a longer period.
- 6. complete trip around the sun.
- 8. imaginary line that runs through the earth's center.
- 9. to move around the sun.
Down
- 2. water deposited on earth in the form of rain.
- 4. occur when the day and night are both 12 hours long.
- 5. a region of reduced rainfall on one side of a high mountain.
- 7. beginning of summer.