Across
- 2. Cannot be scratched by anything other than itself
- 3. The largest rainforest
- 4. Force that pulls us towards Earth
- 7. Famous scientist, known for E=MC2
- 9. Large triangular structures built by the Egyptians
- 10. The largest planet in our solar system
Down
- 1. Process plants use to make food
- 5. The gas we need to survive
- 6. Major sporting event held every four years
- 8. Special object that attracts metal or steel