Chapter 8 Study Guide

Number 3 Two Founders James Hutton and Charles Lyell

Number 4 4 Criteria for Index Fossils Abundant Widespread Distinct Existed for only a short period of time

Number 5 Index Fossils- Fossil used to establish age of rock layer Trace Fossils- Fossilized mark left by the movement of an animal Paleontology- Study of fossils

Number 6 Relative age- Age of something based on rock around it. Absolute age- Actual numeric age of an object.

Number 7 Law of Superposition- Rock layers on the bottom are older that rock layers on the top. Law of Crosscutting Relationships- A intrusion or fault is younger than the rock layer that is cuts through. Principle of OH- Rock layers form in flat layers because of gravity, but can be moved by tectonic forces

Number 7 cont. Principle of Uniformitarianism- The same forces that have acted on Earth in the past are still acting on Earth. Rocks tell time.

Number 8

Number 9 Gravity

Number 10 Sedimentary rock- Only rock that does not have heat and pressure to form

Number 11 Dry and hot climate is needed for mummification because of bacteria

Number 12 Nonconformity between what 2 layers?

Number 13 Dead Buried quickly