| A | B |
| Extinct | Animal that no longer exists |
| Endangered Species Act | Endangered animals and plants are protected by this. |
| Endangered Species | Species that is in danger of becoming extinct |
| Bald Eagle | Is no longer on the endangered species list. |
| Aloe Plant | Lives in the desert and has thick leaves |
| Bromeliad | lives in the rainforest and collects water in it's center. |
| Maple Tree | found in cool climates and has broad leaves. |
| Mudslide | the soil is soaked with waterand slides downhill. |
| Landslide | the soil is dry and slides downhill. |
| Fossil | The hardened remains of an ancient plant or animal. |
| Fossil with sharp pointed teeth. | The animal ate mostly meat. |
| Fossil with rounded teeth. | The animal ate mostly plants and shrubs. |
| Nitrogen | 78% of the atmosphere is made up of this. |
| Oxygen | 21% of the atmosphere is made up of this. |
| Other gases | 1% of the atmosphere is made up of this. |
| Sun, Air, Water, Rocks | Are examples of nonliving parts of an ecosystem |
| Animals, Birds, Plants | Are all living parts of an ecosystem. |
| Decomposer | is an organism that breaks down dead organisms and turns them into nutrients. |
| Birds migrate...... | to avoid cold and find food |
| when a rabbit sees a predator...... | his heartbeat quickens, his muscles tense and his breathing becomes shallow. |
| When threatened...... | a pufferfish swells up with water, this is an example of a behavior. |
| Growing deeper roots..... | is something plants do when they go through a period of no rain. |
| Bright tail feathers may help a bird..... | attract a mate |
| What do fossils teach us? | That life on Earth has taken many forms over time. |
| There are relatively few fossils of soft-bodied animals because...... | soft tissues don't fossilize very well. |