| A | B |
|---|
| energy | the ability to do work |
| energy pyramid | shows amount of energy at different trophic levels |
| matter | anything that has mass and takes up space |
| condensation | when water changes from a gas to a liquid |
| transpiration | loss of water from a plant through its leaves |
| precipitation | rain, snow, sleet,etc |
| nitrogen fixation | when N2 is removed from the air and put into a form usable by plants |
| limiting factor | substance that is in short supply |
| organism | a living thing |
| species | all the living things of one type |
| population | all the living things of one type in a given area |
| community | all the living things in a given area |
| ecosystem | all the living things in an area and their environment |
| biosphere | everywhere on earth there is life |
| evaporation | process by which rain water on the sidewalk changes from a liquid to a gas |
