Natural Science

4. group of organisms of the same species that live in a defined area and are able to breed
7. organisms that make their own food
8. a way to show how different food chains are connected in the environment
10. animal that eats meat only
12. the study of the relationships in an ecosystem
14. the chemical process in which plants make their own food
18. organisms that feed on other things
20. an integrated system of biotic and abiotic factors
22. the angle of the ground relative to the horizontal

1. something produced in addition to the main product
2. the height above sea level
3. a relationship in which both parties depend on each other for something
5. a group of different populations living in a defined area
6. organisms that break down dead animals and plant materials
9. animals that eat plants
11. animals that eat both plants and animals
13. an energy level in an environment
15. a way to show how energy is passed from one organism to another in the environment
16. organic matter in soil
17. the largest ecological unit on earth
19. actively hunt and kill other animals
21. animals that feed on carrion