Organisms and their environment

2. It consists of a network of interconnected food chains.
7. Which allows us to compare the number of organisms present in each tropic level at a particular time.
8. Synonym of biological balance.
11. Made up by various processes by which carbon, in the form of carbon dioxide, that is removed from and released into the environment.
13. One way nitrogen is removed from soil by breaking down nitrates in the soil to nitrogen gas.
14. Made up of different populations of plants and animals live together and interact within the same environment.
15. An organism that get it energy by breaking down dead organisms, faces and excretory products.
17. The position of an organism in a food chain, food web or ecological pyramid.
18. The study of interactions between organisms or organisms and their environment.
20. A group of organisms of the same species that live together in a habitat.
21. The place where an organism lives.

1. A series of organisms through which energy and nutrients are transferred, beginning with a producer.
3. A community of organisms interacting with one another and with its non-living environment.
4. Which allows us to compare the total energy each trophic level of a food chain over a period of time.
5. An organism that makes its own organic food substances.
6. Made up of all the populations of different species living and interacting with one another in a habitat.
9. The relative sizes of the different populations remain constant.
10. Which allows us to compare the mass of organisms present in each trophic level at a particular time.
12. Consists of processes by which nitrogen is constantly removed from the soil and is eventually returned to it in the form of nitrates.
16. Formed by horizontal bar diagrams about relationships between food and energy.
19. An organism that are not able to make its own food. It obtains energy and nutrients by feeding on other organisms.