| Term | Definition |
|---|
| abiotic factor | the non-living, physical aspects of an ecosystem such .as air,water, soil ,heat, light, |
| aerobic respiration | energy releasing biochemicals reaction that use chemical |
| air | a mixture of gases mostly nitrogen and oxygen |
| anaerobic respiration | energy releasing biochemical reaction that don't need oxygen to occur |
| atom | a tiny particle of matter |
| biotic factors | the living things in an ecosystem. |
| carbohydrates | chemical compounds containing carbon, hydrogen, and oxygen. sugar is a carbohydrate. carbohydrates store energy in their chemical bonds. |
| carbon cycle | the movement of carbon atoms through an ecosystem between living organisms as well as the non-living part of the environment. |
| carbon dioxide/oxygen cycle | the recycling of carbon dioxide and oxygen between organisms and the air. |
| carbon dioxide | a chemical compound made from one atom of the element carbon and two atoms of the element oxygen. The chemical formula for carbon |
| cellular respiration | the process of releasing energy stored in carbohydrates. Respiration produces carbon dioxide and water. Respiration usually requires oxygen in which case it is usually called aerobic respiration or aerobic cellular respiration. |
| chemical compound | a molecule composed of atoms of two or more different elements. |
| condensation | the formation of snow or rain from water vapor. |
| decomposers | organisms such as fungi and bacteria that break down the complex chemical compounds made by living things into simple nutrients that are used by food producers. |
| dentrification | the process by which bacteria cause nitrogen gas to be released back into the environment |
| ecology | the study of the relationships and interactions of living things with one another and with their physical environment |
| ecosystem | all the interactions and relationships of organisms with one another and with their physical environment within a certain area. |
| element of matter | a basic type of matter, such as the elements carbon, sulfur, iron, and oxygen. Every element has a different atomic structure. |
| energy | the ability to do work. light and heat are examples of energy. energy has no mass (weight) and occupies no space. |
| extinction | - the complete destruction of all the members of an ecological population- death of every member of a species. |
| food chain | energy links between different organisms in an ecosystem based on feeding habits. |
| food producer | organisms such as plants and algae that create energy-rich food through the process of photosynthesis. |
| habitat | the place in which an organism lives. |
| helium | trace element in air. |
| humus | oil material created by decay of organic material such as dead leaves. |
| krypton | trace element in air. |
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