3.       All the organisms of the same species that live in the same place at the same time make up:

4. More than one population sharing the environment with each other is a:

5.      Food, water, and living space are all examples of:

6.      _________ occurs when more than one individual or population tries to make use of the same limited resource.

7.      The animal that is eaten:

8.      The animal eating the prey:

9.      A type of feeding relationship in which one animal captures and eat another animal for food.

10.      A close relationship between two species

11.      A system of several overlapping food chains:

12.      The decrease in available energy at each level of a food chain is shown using a:

13.      The first organisms to live in an area are called:

14.      To move into an area:

15.      When a community reaches a stable point where very few new plants can colonize:

16.      The part of Earth that supports life:

17.      The general weather of an area over a long period of time

18.      A large region characterized as having a distinct climate and specific types of plant and animal life.

1.      Animals that have a backbone:

20.      Animals that do not have a backbone.

1.      All the organisms that live in an area together with the nonliving factors of the environment: