| A | B |
|---|
| Adaptation | PHYSICAL OR BEHAVIORAL TRAIT THAT HELPS A SPECIES SURVIVE IN ITS NATURAL HABITAT |
| Birthrate | RELATIONSHIP BETWEEN THE NUMBER OF BIRTHS AND THE WHOLE POPULATION. THE PERCENTAGE OF ANIMALS BORN IN A POPULATION IN A YEAR. |
| Community | all the living things in an ecosystem make up a community. |
| Competition | living things that share space in an ecosystem having to compete for a limited supply of food |
| Consumer | an organism that eats other organisms to obtain energy. |
| deathrate | RELATIONSHIP BETWEEN THE NUMBER OF DEATHS AND THE WHOLE POPULATION. THE PERCENTAGE OF ANIMALS THAT DIE IN A POPULATION IN A YEAR. |
| Decomposer | organisms that break down bodies of dead plants and animals, creating nutrients in the soil and water. |
| ecosystem | COMMUNITY OF LIVING THINGS INTERACTING WITH EACH OTHER AND WITH THE PHYSICAL ENVIRONMENT |
| endangered species | SPECIES THAT COULD BECOME EXTINCT |
| Extinct | species that dies out. |
| food chain | ENERGY THAT IS PASSED FROM LIVING THING TO ANOTHER; BEGINS WITH PLANTS. |
| food web | – CONSISTS OF MANY FOOD CHAINS THROUGH WHICH ENERGY FLOWS THROUGH THE ECOSYSTEM. |
| habitat | specific place within an ecosystem where a living thing can find food, shelter, and other things it needs to survive |
| keystone species | one that helps the whole ecosystem |
| Limiting factors | stop a population from increasing |
| Migration | traveling between groups |
| niche | a species’ role in the environment |
| Phytoplankton | microscopic plants that float around in ocean water. |
| Populations | the numbers of different species that make up a healthy environment. |
| predator | an animal that hunts and eats other animals to survive. |
| prey | the animals that predators hunt. |
| primary consumer | eat plants and use food energy in the plants for fuel their bodies. |
| producer | organisms that produce their own food. (plants) |
| respiration | breaking down of sugars and carbohydrates by combining them with oxygen. |
| secondary consumer | organisms that eat primary consumers. (animals eat primary consumers) |
| species | each different kind of plant or animal that belongs to its own group. |
| tertiary consumer | third consumer |
