Across
- 1. why we have layers
- 3. one of the elements in the core
- 5. the heat causing rocks to rise and fall
- 9. layer between the inner core and the mantle
Down
- 2. the type of waves something that helps scientists learn about the layers of the Earth
- 4. Earth's largest layer
- 6. Earth's thinnest layer
- 7. solid ball of metal made of nickel and iron
- 8. the number of layers Earth has