| A | B |
|---|
| abiotic | The nonliving, physical features of the environment, including air, water, sunlight, soil, temp. & climate |
| biotic | The features of the environment that are alive or were once alive. |
| biosphere | Part of Earth that supports life, including the top portion of the crust, atmosphere, & all surface water |
| biomes | Large geographic areas with similar climates and ecosystems |
| ecosystem | All the living organisms that live in an area & the nonliving features of the environment. |
| greenhouse effect | A condition where radiation enters the atmosphere and can't escape causing a warming effect. |
| food web | A model that shows the complex feeding relationship among organisms in a community. |
| species | A group of organisms that reproduces only with other members of their own group. |
| population | All the organisms that belong to the same species living in a community. |
| succession | Natural, gradual changes in the types of species that live in an area. |
| reactants | Substances that undergoes a change in a chemical reaction. |
| products | Substances that are formed as a result of a chemical reaction. |
| chemicalequation | A representation of a chemical reaction in which the the reactants & products are expressed as formulas. |
| coefficients | Numbers that appear before a formula in a chemical equation. |
| chemicalenergy | The energy stored in chemical bonds. |
| exothermicreaction | A chemical reaction that releases energy to its surroundings. |
| endothermicreaction | A chemical reaction that absorbs energy from its surroundings. |
| reactionrate | The rate at which reactants change into products. |
| catalyst | A substance that affects the rate of a chemical reaction without being used up in the reaction. |
| chemicalreaction | The process that produces chemical change, resulting in new substances that have properities different from those of the original substances. |
