Matter

2. Rock - Rock that has formed when sediment transported by water (rivers, lakes, and oceans), ice (glaciers), and wind compress to form a solid. Sedimentary rocks are often deposited in layers, and frequently contain fossils.
3. - The movement of magma onto the surface of the earth through volcano craters and cracks in the earth's crust, forming igneous rock.
5. Age - A comparison of age based on which object (or event) is older or younger than some other object or event.
7. Rock - Rock that is formed when magma or lava cools and forms a solid. Igneous rock forms intrusions and extrusions.
9. Time Scale - The divisions that show timing and relationships between events that have occurred during the history of the Earth.Paleontologist - A scientist that studies fossils
10. Fossil - A widely distributed fossil of a narrow range in time, used to determine the age of related rock formations
12. of Superposition - The law that states in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom

1. - A scientist that studies fossils
4. - The entry of molten rock or magma into or between other rock formations
6. Age - The true age of a rock or fossil that tells scientists the number of years ago a rock layer formed.
8. - The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock
11. - A division of geologic time marked by distinctive developments and events