| Term | Definition |
|---|---|
| predator | An organism, usually an animal, that kills another organism for food. |
| prey | An organism that is hunted and eaten by another organism. |
| photosynthesis | The process in which plants and some other organisms use the energy in sunlight to make food. |
| chlorophyll | A green pigment that traps energy from the sun. |
| symbiosis | The relationship between two organisms or species that live together in an environment. |
| host | An organism that is infected by a parasite. |
| parasite | An organism that lives in or on another organism (the host) and obtains nourishment from the host but provide nothing back to that host. |
| environment | All the living and nonliving things that surround an organism. |
| resource | A naturally material in or on Earth’s crust or atmosphere of potential use to humans. |
