rocks

3. reef: produce skeletons that grow together to form a structure
8. rock: forms where the remains of plants and animals are deposited in thick layers
9. rock: igneous rock that formed when magma hardened beneath earth's surface
12. particles glued together as mineral solutions harden
13. look or feel of a rocks surface
16. metamorphic rocks that have their grains arranged in parallel layers or bands
17. rock: igneous rock formed from lava that erupted onto earth's surface
19. rock: minerals that are dissolved in a solution crystallize

1. rock: sedimentary rock that forms when rock fragments are squeezed together
2. rock: forms from the cooling of magma
4. small solid pieces of material that come from rocks or living things
5. cycle: a series of processes on earth's surface and in the crust and mantle that slowly change rocks from one kind to another
6. rocks that are made up of other rocks or minerals
7. particles deposited as loosely packed sediment
10. rock: forms when particles of other rocks or the remains of the plants and animals are pressed and cemented together
11. rock: forms from other rocks that are changed by heat and pressure
14. particles carried away from their source by water or wind
15. a light colored rock that has a high silica content
18. dark colored rock that is low in silica