Across
- 2. instrument that measures temperature
- 3. earth's internal heat
- 5. state of being equal
- 6. container that keeps liquids hot
- 9. a picture produced by photography using light
- 11. process in which plants use light to make their own food
- 13. half of a sphere
- 14. crust of the Earth
- 16. equal in value
- 17. regulates temperature
- 19. equal values in math
Down
- 1. a person who takes pictures
- 4. gases surrounding the Earth
- 7. equal amount of day or night
- 8. all living things on the Earth
- 10. a photographic reproduction of a document
- 12. heat
- 15. imaginary line around the center of the Earth
- 18. all the water on Earth