| Term | Definition |
|---|
| oxygen | A part of the air that is needed by most plants and animals to live |
| organisms | a living thing that carries out five basic life functions on its own |
| cells | the smallest unit of living matter |
| tissues | a group of similar cells that work together carrying out a certain job. |
| organ | a group of tissues that work together doing certain jobs. |
| organ system | a group of organs that work together carring on life functions. |
| kingdoms | The largest group into which an organism can be classified. |
| traits | a characteristic of a living thing |
| genus | a group made up of two or more very similar species |
| species | the smallest classification group |
| fossil | any evidence of an organism that lived in the past |
| embryo | an undeveloped animal or plant |
| extinct | no longer alive on Earth |
| ecosystem | the living and nonliving things in an environment and all thier interactions |
| community | the living part of an ecosystem |
| populations | made of only one type of organism living in an area |
| habitat | an organism's home |
| producers | make food |
| consumers | use the food producers make |
| decomposers | break down wastes and the remains of other organisms |
| food chain | the steps in which organisms get the food they need to survive |
| food web | shows how food chains are related within an ecosystem |
| drought | a long period of time with little or no precipitation |
| overpopulation | happens when an ecosystem has too many of at least one kind of living thing. |
| pollution | when harmful substances are added to Earth's water, air, or land |
| acid rain | acids that mix with water in the air and fall to Earth |
Combine with other sets
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