Across
- 2. adjusting to the environment
- 4. rocks and landforms forming into different shapes and sizes because of wind or water
- 6. millions of years old animals that are dead
- 8. a theory that we evolved from an animal
- 9. parts vary because of genetics
- 10. a group of rocks together as one
Down
- 1. a person who studies earth history
- 3. you know the exact age l
- 4. a time period in the earth
- 5. the guess of an age
- 7. rock that was formed by lava