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Chapter 7 Jared

Science

QuestionAnswer
contenential drift the theory that all continents made on big continent
uniformitarism the idea that earths processes that are at work today were in the past
superposition the theory that in a stack of rocks the oldest rock is on the bottom
sedimentary rock one of the three types of rocks
Pangaea the theory that there was a super continent
plate tectonics the system of the plates movements
fossil record information about what an organism looks like, where it lives and how it evolved
absolute dating calculated by using half-lifes of certain isotopes
estimation an approximate calculation of quantity
radioactive decay when an unstable atomic nucleus changes to another nucleus
igneous rock one of the three types of rocks
relative dating age based objects found at the same site
half-life the time it takes a a given amount of radioactive isotope to decay to half its mass
atom the particles that make the world
index fossil the fossilized remains of an organism that existed over areas for a short period of time
Created by: 201100200
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