Across
- 4. Heat transfer through gas.
- 6. Mostly caused by humans. Exp. smoking and burning fuel.
- 7. Makes up 78% of air.
- 10. The densest layer.
- 11. The coldest layer.
- 12. The layer that contains the Ozone Layer.
- 13. Heat transfer through gas and liquid.
Down
- 1. Wind at 250 mph.
- 2. Made by heat and Earth's rotation.
- 3. Heat transfer through gas, solid, and liquid.
- 5. No one knows where this layer ends.
- 8. Blocks out gamma rays.
- 9. Heat rises and cool air sinks.
