| A | B |
| community | all the species of organisms in an environment |
| food web | all of the food chains in a community |
| population | all the members of one species in an environment |
| flower | the part of the plant that produces seeds and fruit |
| stem | the part of the plant that supports the leaves and transports nutrients |
| habitat | a place where an animal or plant lives |
| evaporation | a change of state from a liquid to a gas |
| condensation | a change of state from a gas to a liquid |
| solid | one of the three states of matter-it has a definite and volume |
| liquid | one of the three states of matter-it has its own volume but takes the shape of its container |
| gas | one of the three states of matter; it has no shape or volume of its own |
| precipitation | moisture that falls from the clouds to the ground; snow, sleet, hail,or rain |
| germinate | when a seed stops being dormant (resting) and begins to grow |
| vapor | water in the gaseous state |
| light energy | energy produced from a light source |
| mammal | an organism with a backbone, fur, gives birth to live young and produces milk |
| sound energy | energy that comes from a noise |
| electrical energy | energy that comes from a flow of electricity |
| mechanical energy | energy an object has because it is moving |
| food chain | a flow of energy through a community |
| roots | the part of the plant that takes in water and nutrients from the soil and anchors the plant in the ground |
| photosynthesis | the process where a plant uses sunlight, water, and air to produce its own food (sugar) |