Geologic Time

4. The process by which sunlight and carbon dioxide form sugar and water as a biproduct.
6. This law states that in an undeformed sedimentary rock sequence, each layer is older than the one above it.
7. A break in the rock record.
9. Molten rock below the surface.
11. The time it takes for half a sample of unstable nuclei to decay.
12. _____ dating is the law scientist use to place rocks in chronological order.
13. Change over time.
14. Unstable nuclei spontaneously break apart, decay

1. Igneous _____ is a mass of magma that penetrates an opening in an exisiting rock and solidifies.
2. Any remains, trace, or imprint of a living thing.
3. A widespread fossil that existed for a relatively short period of time.
5. Physical featuer of Earth's surface that have a characterisic shape and are produced by natural processes.
8. Traits that improve an individual's ability to survive a changing environment.
10. A single celled organism that lacks a nucleus.