Across
- 2. igneous rock that cools quickly on Earth’s surface
- 3. rock formed when heat and pressure change existing rock
- 5. preserved remains or traces of ancient life
- 7. process of sediments being dropped in a new location
- 11. rock formed from sediments compacted and cemented together
- 12. smooth, flat way a mineral breaks
- 13. molten rock beneath Earth’s surface
- 14. structure repeating pattern of atoms in a mineral
- 17. naturally occurring, inorganic substances that make up rocks
- 19. reaction fizzing or bubbling of some rocks, like limestone, when acid is applied
- 21. movement of sediments from one place to another
- 22. jagged or uneven way a mineral breaks
- 24. amount of space an object takes up
- 25. mass of a substance divided by its volume
- 26. age the exact age of a rock or fossil in years
- 29. cycle continuous process that changes rocks from one type to another
- 30. process that presses sediments together
- 31. measured by Moh’s scale to show how easily a mineral can be scratched
Down
- 1. small pieces of rock, shell, or organic material
- 4. rock formed from cooling and solidification of magma or lava
- 6. igneous rock that cools slowly beneath Earth’s surface
- 8. process that glues sediments into solid rock
- 9. how light reflects from a mineral’s surface
- 10. age compares if one rock or fossil is older or younger than another
- 15. molten rock on Earth’s surface
- 16. horizontal layers of rock that show Earth’s history
- 18. color of a mineral’s powder when rubbed on a plate
- 20. fossils fossils from organisms that lived a short time but were widespread
- 23. amount of matter in an object
- 27. of superposition principle stating the oldest rock layers are at the bottom
- 28. breaking down of rocks into smaller pieces
- 29. solid mixtures of minerals that form Earth’s crust