Rock Cycle

2. having the effect of making something less warm or hot.
3. the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans.
5. a light, porous rock formed by consolidation of volcanic ash.
7. an extremely compact, hard, granular rock consisting essentially of quartz. It often occurs as silicified sandstone, as in sarsen stones.
9. hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock are formed on cooling.
11. hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.
15. the exertion of force on something so that it becomes more dense.
17. sedimentary rock consisting of sand or quartz grains cemented together, typically red, yellow, or brown in color.
18. the process of eroding or being eroded by wind, water, or other natural agents.
20. a shelf or slab of stone, wood, or metal at the foot of a window or doorway.

1. a system of subparallel wavy ridges and furrows left on sand or mud by the action of water or wind, and sometimes fossilized.
4. a piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces.
6. (of a rock formation) be broken by a fault or faults.
8. relating to or denoting a group of light-colored minerals including feldspar, feldspathoids, quartz, and muscovite.
10. is a small cavity in rock lined with crystals or other mineral matter.
12. the bottom of the sea or a lake or river.
13. (of rock) having solidified from lava or magma.
14. the remains or impressions of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
16. a point at which parts of an artificial structure are joined.
19. becoming liquefied by heat.