Across
- 1. Identified and given meaning by people
- 4. Matter that keeps the same volume and changes shape.
- 8. Geographical concept to do with different levels.
- 11. Keeping the Earth and it's resources for future generations
- 12. A 90 degree angle
- 13. The distribution of things on Earth
Down
- 2. An angle less than 90 degrees
- 3. Warm blooded animals
- 5. positive + negative is a...
- 6. cold blooded animals
- 7. Rigid state of matter
- 9. negative plus negative is a...
- 10. matter that flows through the air
- 14. A many-sided shape
- 15. Differences in an environment over time.