| Term | Definition |
|---|---|
| Producer | an organism that can make its own food by using energy from its surroundings |
| Consumer | an organism that eats other organisms or organic matter |
| Predator | are wild animals that hunt, or prey on, other animals. All animals need food to live. |
| Prey | an organism that is killed and eaten by another organism |
| Parasite | an organism that lives on or in an organism of another species, known as the host, from the body of which it obtains nutriment. |
| Host | is an organism that harbors a parasite, or a mutual or commensal symbiont, typically providing nourishment and shelter. |
| Food web | a diagram that shows the feeding relationships between organisms in an ecosystem |
| Marine ecosystem | complex of living organisms in the ocean environment. |
| Freshwater ecosystem | consists of lakes, ponds, rivers and streams |
| Terrestrial ecosystem | is an ecosystem found only on landforms. |
| Carnivore | Animals that subsist on a diet consisting only of meat |
| Herbivore | any organism that eats only plants. |
| Photosynthetic | The process in green plants and certain other organisms by which carbohydrates are synthesized from carbon dioxide and a source of hydrogen (usually water), using light as an energy source. |
| Tropic level | is the position that an organism occupies in a food chain – what it eats, and what eats it. |
| Omnivore | is an animal that eats both plants and animals for their main food |
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