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Lesson 32

Evidence of Change

QuestionAnswer
Uniformitarianism the theory that all geological occurrences result from existing forces that have been occurring uniformly from the begining of the earth to the present
Fossils the preserved remains or traces of ancient organisms
Palentologists scientists that study fossils
Sedimentary Rock rock formed by deposited sediment
Herbivore an animal that eats only plants or plant material is called this. Rabbits, cows, sheep, and deer are all examples
Carnivore an animal that eats only meet. Lions, tigers, and snakes are examples
Geological Time Scale uses the positions of rock layers as a record of life that once lived. Eons, eras, periods, and epochs make this up
Relative Dating a technique used to obtain an approximate date of rocks or fossils. This technique compares fossils with other fossils in different layers of rocks to show their age
Radioactive Dating one method used to determine the age of an object. This works by measuring the amount of specific radioactive atoms in an object. From this it can be determined how much it has decayed over time. By using this method scientists can determine the age of a
Decay in terms of radioactive elements, this refers to an atom giving off radiation and becoming a different particle or element
Half-Life the amount of time required for half of the element to decay into its stable form
Absolute Dating how the age of an object is determined through using radioactive dating. Radioactive dating works by measuring the amount of specific radioactive atoms in an object. From this it can be determined how much it has decayed over time. By using this method, s
Created by: ecotteacher
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