Ecology 3rd grade

2. Sometimes farmers put these, such as fertilizers and insect killers, in the soil to protect crops but they can pollute nearby water.
4. Reusing items such as aluminum cans, tin cans, glass bottles, plastic, cardboard, newspapers and even junk mail.
6. Uses solar energy to produce its own food.
7. Removing a species from its environment can upset the balance of a _______ cycles.
11. Eat other living things to survive.
12. Worms and bacteria that break down dead animals
13. Making something dirty, impure, or unsafe
14. An unexpected decomposer on land
15. Cars and other vehicles put these in the air as a result of burning fuel in their engines.
16. The study of the relations between living things and their environment

1. Thanks to his ideas and work, the US now protects millions of acres as national parks and forests.
3. Another word for environment
5. Meat eaters (like wolves)
6. Make their own food
8. Using something carefully and not wasting it
9. Plant eaters (like deer)
10. To break something down into smaller pieces