| A | B |
| Deciduous forests | Trees in this have broad leaves that block sunlight |
| Food Chain | Energy passes from one organism to another in this |
| Abiotic factors | Water and rocks are this in an environment |
| Decomposers | They break down dead organisms |
| Ecosystem | Can be small, such as a log, or large, such as a forest |
| Producers | The source of all food in an ecosystem |
| Consumers | Animals that eat other organisms to get the energy they need to survive |
| Grassland | A prairie, which has very few trees |
| Biomes | There are six major these on earth |
| Tundra | Plants here include arctic moss, arctic willow, and bearberry |
| Herbivores | Animals that eat only plants |
| Rocks | An example of an abiotic factor in an ecosystem |
| Tundra | The only ecosystem where the ground is frozen all year long |
| Carnivores | Animals that consume other animals |
| Producers | Found at the base of an energy pyramid |
| Desert | A sandy or rocky biome with little rainfall |
| Sunlight | Producers can't make food without this |