Across
- 5. a rock formed by heat and pressure
- 6. the layer between the crust and the mantle
- 8. what is necessary for a sedimentary rock to form
- 9. a rock formed with sediment and water
Down
- 1. the only liquid layer of the Earth
- 2. the thickest layer of the Earth
- 3. the top-most layer of the Earth that has tectonic plates
- 4. a rock formed from melting and cooling
- 7. an igneous rock that is used for countertops or floors