| A | B |
| acid rain | rain that picks up chemicals from polluted air and becomes acidic |
| algae | simple plants that live in water |
| community | all plants and animals living in the same environment |
| condensation | to change water from a gas to a liquid through cooling |
| sonsumer | an organism that eats a living thing for energy |
| decomposer | an organism that gets energy from decomposing material |
| ecosystem | communities interacting in their environment and functioning as a system |
| evaporation | to change from a liquid to a gas through heating |
| ground water | water stored underground in soil |
| organism | a living thing |
| photosynthesis | the process by which plants use sunlight, water, and carbon dioxide to produce glucose and oxygen |
| plankton | drifting microscopic organisms found in water |
| precipitation | condensed water vapor in the from or rain, sleet, snow, or hail |
| predator | animal who feed on other animals |
| producer | animal that makes its own food |
| water cycle | circulation of the earth's water through evaporation, condensation, and precipitation |
| water vapor | water as a gas in the atmosphere |