| A | B |
| ingestion | the process of eating or putting food in your mouth |
| metabolism | sum total of all chemical reactions in the body |
| organic | compounds that contain carbon and are found in living things |
| life span | maximum amount of time an organism is expected to live |
| producer | organisms that can make their own food |
| theory | an educated guess that explains how things happen |
| consumer | describes an organism that cannot make its own food |
| Spontanious generation | theory that states living things came from non-living things |
| Redi | a man who did experiments with jars of rotting meat and flies |
| photosynthesis | process by which plants make their own food |
| warm blodded | animals that maintain their body temperature at a constant level internally |
| homeostasis | the ability to keep conditions inside an organism constant |
| multicellular | an organism that contains more than one cell |
| sun | primary source of all energy we get on Earth |
| unicellular | an organism that has only one cell |