| A | B |
|---|
| Ecosystem | All living and nonliving things in an environment |
| Herbivore | Organism that eats only plants |
| Carnivore | Organism that eats only animals |
| Omnivore | Organism that eats both plants and animals |
| Producer | Living thing that can make its own food |
| Consumer | Organism that gets energy from other living things or their remains |
| Decomposer | Organism that breaks down once-living things |
| Food Chain | Path by which energy is transferred between organisms |
| Food Web | Overlapping, or linking food chains |
| Predator | Animal that hunts and kills other animals for food |
| Prey | Animal hunted by another animal |
| Scavenger | Animal that eats dead or dying animals |
| Water Cycle | Movement of water through an ecosystem |
| Evaporation | Liquid changes to a gas |
| Condensation | Gas changes to liquid droplets |
| Precipitation | Process by which water falls to the ground |
| Transpiration | Water given off by plants through leaves |
| Ground Water | Collections of water on the ground |
| Respiration | Oxygen combines with food, releases energy and CO2 |
| Photosynthesis | CO2 used to produce carbon compounds, gives off Oxygen |
| Protein | Biomolecule in living things - needs nitrogen |
| Nitrates | Form of nitrogen used by plants |
| Bacteria | Break down nitrogen to form nitrates |
| Population | Group of same kind of organism living together |
| Community | All the populations in a region |
| Extinct Organism | Organism once alive - no longer on Earth |
