Across
- 6. the type of rock that forms when lava cools to form crystals
- 7. the type of rock that forms under heat and pressure for many years
- 9. the breaking up of rocks into smaller pieces called sediments
Down
- 1. the outermost layer of Earth
- 2. when material is processed and repurposed for a new use
- 3. the most abundant gas in the atmosphere
- 4. the type of rock that forms when sediments build over time and are squashed together
- 5. the squashing of sediments together to make a new rock
- 8. the movement of sediments to somewhere far away from the original rock