| A | B |
|---|
| food webs | shows the connections among the different food chains in an ecosystem |
| producers | plants |
| crustaceans | crawfish, crabs, and lobsters |
| wetlands | swampy environments |
| tundra | cold environments with very little vegetation |
| forest | woodlands |
| producer/consumer | a producer is eaten by a consumer |
| predator/prey | a predator and kills prey for food |
| carrying capacity | the actual number of living things that an ecosystem can support is limited by the available energy, water, air, space, and food |
| adaptations | special characteristics that allow plants and animals to survive in the environment that they live in |
| How adaptations help | they help a plant or animal find food, shelter, survive certain weather conditions, and protect themselves |
| Some types of adaptions | hibernation, camouflage, and mimicking (looking or acting like another organism for protection) |
| pollution | is any harmful substance in our air, water, or soil |
| carbon monoxide | car exhaust; a gas that comes from cars and pollutes the air |
| Some causes of pollution | factories, burning oil and gas, fertilizers polluting water with algae |
| Nitrogen cycle | needs bacteria in order to transform nitrogen gas |
| Sun | a medium-sized star |
| rotation | the movement of Earth on its axis that causes day and night (spinning top) |
| revolution | the movement of Earth on its orbit around the Sun (365 1/4 days) (hula hoop) |
| Jovial planets | the outer planets that are made up mainly of gases |
