Fossils
Relative Dating
Absolute Dating
Geology
100
A trace or remnant of an organism that lived long ago.
What is a fossil?
100
Determines whether an object or event is older or younger than other objects or events.
What is relative dating?
100
Determines actual age of an event or an object in years
What is absolute dating?
100
Scientific study of origin, history, and structure of Earth and processes that shape it
What is geology?
200
All fossils discovered on Earth go in the...
What is the fossil record?
200
states that a fault or a body of rock must be younger than any feature or layer that the fault or rock body breaks through.
What is the law of crosscutting(relationships)?
200
Fossils used to estimate absolute age of rock layers in which they are found
What are index fossils?
200
Divides Earth's history into intervals of time defined by major events or changes on Earth.
What is the Geologic time Scale?
300
How to figure out how the climate changed in trees.
What are rings?
300
Happens when Earth's forces move rock layers up or down unevenly.
What is tilting?
300
Used to date mostly igneous rocks
What is Potassium-Argon dating?
300
Pangaea was formed in the era.
What is the Paleozoic Era?
400
Makes mountains more rounded.
What are weathering and erosion?
400
Represents an ideal image of rock layer sequence that actually doesn't exist in any one place on Earth
What is a geologic column?
400
Determined the earliest accurate age of Earth
What is Uranium-Lead Dating?
400
The Mid-Atlantic Ridge formed during this era.
What is the Mesozoic Era?
500
Continents move because of these...
What are plate tectonics?
500
Causes sediment to be deposited in horizontal layers.
What is gravity?
500
Index Fossils act as these
What are markers?
500
65 million years ago, the Cenozoic Era split into these two periods.
What are the Tertiary and Quaternary?
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