Across
- 3. The place where plants and animals live.
- 6. Animals, birds, and plants together form this.
- 8. We breathe this to stay alive.
- 9. Large areas of land covered with trees.
- 10. This planet is our home.
Down
- 1. Keeping our surroundings clean is called.
- 2. We should save this natural resource.
- 4. This gives us light and heat.
- 5. The ground we walk on.
- 7. We should not cut trees to protect this.