Across
- 1. - save and protect
- 4. - largest land areas of land on Earth; there are 7
- 5. - dig for materials
- 7. - change the way you do something
- 10. - bring water through pipes
- 11. - height of land above sea level
- 12. - resource that can be replaced in a short time
- 13. - use an item again
- 14. - place where there is much flat land and rich soil
- 17. - all living things that interact with each other
Down
- 2. - resource that takes a long time or cannot be replaced
- 3. - washing away of soil by rain
- 6. - the weather that a place has over a long period of time
- 8. - the daily conditions outside
- 9. - kinds of plant life
- 10. - place where many kinds of factories are located
- 14. - shelters and other buildings built with sun-dried bricks
- 15. - the form or shape of part of Earth’s surface
- 16. - change something