Across
- 6. a gas that traps the sun’s heat over Earth
- 8. continuous movement of air or water in the same direction
- 10. Plant life
- 12. diversity of species in an ecosystem
- 13. to soak thoroughly
Down
- 1. temperature changes caused by pollution
- 2. farming to grow only enough food for families to eat
- 3. area good for farming
- 4. a small river that drains into a larger river
- 5. SHADOW a dry region on one side of a mountain range
- 7. a process by which plants and trees release water vapor into the air
- 9. Wide open areas used for grazing and crops
- 11. natural change in weather