Ecosystems

3. in an environment the living and nonliving things that affect each other or interact form this.
4. forests that are warm/wet in the summer and cold in the winter
9. Provides the population with all its needs and includes nonliving and living things.
11. the lowest layer of the rainforest, many animals live here
12. water that has a lot of salt in it
14. an ecosystem made up of large, flat areas of land that are covered with grass.
15. an area in which the main plants are trees
16. everything around a living thin
18. the middle layer of the tropical rainforest
19. the top layer of the tropical rainforest

1. water that has very little salt in it
2. All the populations that live in an ecosystem
5. a type of forest in which the main types of trees are conifers
6. forests which their environment is damp and cold
7. a group of the same kind of living things that live in the same place at the same time.
8. an ecosystem found where there is very little rainfall
10. the name for a grassland in the United States
13. The largest ecosystem
17. forests that are hot and wet all year