This is your list of words for the Unit test. (You do not have to study enrichment pages, or Lessson 22: Biome facts)
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| 12098963 | ecology | the study of living things and their environments | |
| 12098964 | environment | everything that surrounds a living thing | |
| 12098965 | interact | to act upon eachother | |
| 12098966 | community | all populations that live in a certain place | |
| 12098967 | ecosystem | living and nonliving things in an environment, together with their interactions | |
| 12098968 | population | group of the same kind of organism living in a certain place | |
| 12098969 | habitat | place where an organism lives | |
| 12098970 | niche | organism's role, or job, in its habitat | |
| 12098971 | carrying capacity | largest amount of a population that can be supported by an area | |
| 12098972 | limiting factors | conditions in the environment that put limits on where an organism can live | |
| 12098973 | range | area where a type of animal or plant population is found | |
| 12098974 | cycle | something that happens over and over in the same way | |
| 12098975 | nitrogen-fixing bacteria | bacteria that can use nitrogen in soil to make nitrogen compounds | |
| 12098976 | consumer | organisms that obtain food by eating other organisms | |
| 12098977 | decomposer | organism that breaks down the wastes or remains of other organisms | |
| 12098978 | producer | organism that makes its own food | |
| 12098979 | scavenger | animal that eats only dead organisms | |
| 12098980 | energy pyramid | way of showing how energy moves through a food chain | |
| 12098981 | food chain | a chain of organisms in which each link feeds on the one ahead and is eaten by the one behind | |
| 12098982 | food web | way of showing how food chains are related | |
| 12098983 | climax community | last community in a succession | |
| 12098984 | succession | gradual change in organisms that occurs when the environment changes | |
| 12098985 | biome | large region of the earth with particular plant and animal communities | |
| 12098986 | climate | overall weather in an area over a long period of time | |
| 12098987 | conservation | wise use of natural resources | |
| 12098988 | natural resource | materials found in nature that are used by living things | |
| 12098989 | nonrenewable resource | materials found in nature that CANNOT be renewed or replaced | |
| 12098990 | renewable resource | natural resouces that CAN be renewed or replaced | |
| 12098991 | endangered species | kinds of living things that are in danger of dying out | |
| 12098992 | pollution | release of harmful materials into the environment | |
| 12098993 | biosphere | thin zone of the earth that supports all life | |
| 12098994 | predator | animal that hunts and eats other animals | |
| 12098995 | prey | animal hunted or caught for food | |
| 12098996 | cell | basic unit of structure and function in living things | |
| 12098997 | organism | any living thing | |
| 12098998 | response | reaction to a change | |
| 12098999 | Adaptation | trait of a living thing that helps it live in its environment | |
| 12099000 | environment | Everything that surrounds a living thing | |
| 12099001 | digestion | process of breaking down food so that it can be used by living things | |
| 12099002 | excretion | process of getting rid of wastes | |
| 12099003 | ingestion | process of taking in food | |
| 12099004 | respiration | process of getting energy from food | |
| 12099005 | transport | process of moving nutrients and wastes in a living thing | |
| 12099006 | homeostasis | the ability of a living thing to keep conditions inside its body constant | |
| 12099007 | biotic | living | |
| 12099008 | abiotic | non-living |
