| A | B |
|---|
| ecology | the scientific study of how living things interact with each other and the environment |
| ecosystem | all teh living things and non-living things that interact in a particular environment |
| biotic factor | a living thing in an ecosystem |
| abiotic factor | a nonliving, physical, or chemical part of an ecosystem |
| energy | the ability to do work or to cause a change |
| environment | everything that surrounds a living thing |
| matter | anything that has a mass and volume. Matter exists as liquid, solid, or gas. |
| nutrient | a substance that an organism needs to live |
| photosynthesis | the process by which green plants and other producers use simple compounds and energy from light to make sugar |
| respiration | the physical and chemical process by which a living thing exchanges gases with the environment |
| system | a group of objects that interact |
| biology | the scientific study of life and all living things |
