| A | B |
|---|
| producers | because plants can fuel their own growth they are called this |
| precipitation | rain and snow are forms of this |
| niche | the specific role and organism has in its environment is called its what |
| nitrogen fixation | the process of changing atmospheric nitrogen into usable compounds is called |
| consumer | a cat eats a sparrow that ate a beetle that ate a blade of grass. the cat is the what in the food chain |
| succession | the replacement of communities over a period of time is called what |
| ecosystem | area in which living things interact with each other and the environment |
| food web | a network of relationships in which the flow of energy branches out in many directions |
| abiotic factor | the nonliving part of an ecosystem, such as air, soil, and water |
| biotic factor | the living part of an ecosystem |
| community | two or more groups of different organisms that live and interact in the same area |
| population | all the same organisms of the same species living in a certain place |
| food chain | food energy passed down from organism to organism in a sequence of events |
| energy pyramid | a diagram that shows the amount of energy available at each level of the food chain |
| evaporation | a process where energy from the sun changes water from a liquid to a gas |
| condensation | a process where the atmosphere cools and water vapor turns back to liquid |
