Science crossword

6. resources Anything in the environment that humans use
7. The material that forms when plants and animals decay
11. The movement of rock pieces and other materials on Earth’s
13. A mixture of humus and tiny rock pieces
14. How many layers of soil are there?
16. Rock is broken into smaller pieces. But the makeup of rock does not change
17. Made up mostly of rock pieces
19. Less than……………of the soil on Earth is good for farming
20. States such as……………used to be covered with grass

1. What means using soil in ways that save it
2. The makeup of rock changes
3. The breaking down of rocks and other materials
4. Farmers plow fields along curves of slopes instead of straight up and down slopes
5. When the wind blow the dust away
7. When dead plants and animals decay, or break down, and form what
8. A solid layer of rock under the soil
9. The climate affects the soil how?
10. farmers leave dead weeds and stalks in the fields
12. An areas average weather
15. The material on Earth’s surface in which plants can grow
18. Living things that break down dead organisms are called