| A | B |
|---|
| biosphere | parts of planet where life exists |
| autotroph | makes its own food |
| heterotroph | gets food from other organisms |
| photosynthesis | using light energy to make food |
| herbivore | eats only plants |
| carnivore | eats only animals |
| omnivore | eats plants and animals |
| decomposer | breaks down organic matter |
| food chain | steps showing transfer of energy by eating and being eaten |
| food web | all the interconnected food chains in an ecosystem |
| trophic level | each step in a food chain or web |
| energy pyramid | shows energy available at different trophic levels |
| evaporation | water changes from a liquid to a vapor |
| limiting factor | resource that limits a population growth such as water, food or shelter |
| invasive species | an organism introduced to a new ecosystem |
| carrying capacity | the maximum amount of organisms an area can hold |
