Time Scale
Grand Canyon
Fossils
Other
Earth History
100
A time scale that uses dates and/or numbers.
What is Numerical time scale?
100
The age of the Grand Canyon.
What is 10 million years old?
100
The remains or traces of a living organism that is imprinted or presrved in a rock.
What is fossil?
100
This or (these) rocks can change because of heat or pressure.
What is all three types of rocks?
100
Age of earth.
What is 4.5 billion years?
200
A time scale that compares parts to a whole.
What is proportional time scale?
200
The river that eroded through the Grand Canyon and still flows today.
What is Colorado river?
200
The most likely rock type that can contain fossils.
What is a sedimentary rock?
200
The oldest known rock on planet earth.
What is pillow rock?
200
This ore made most of earths oceans seem greenwhen earth was forming.
What is iron?
300
A time scale that shows events in order starting from today.
What is geological time scale?
300
Age of what the Grand Canyon reveals.
What is 1.7 billion years ago?
300
Index fossils are the key to the _______.
What is past?
300
This liquid condensed to form clouds.
What is water?
400
A measurement that makes a larger number into a smaller number so it can fit on a time scale.
What is scale?
400
A force resposible for pushing layers up in the Grand Canyon.
What is uplift?
400
A fossil that provides evidence of a prehistoric enviroment. This fossil lived for a short period of time in many places.
What is index fossil?
400
A rock that forms because of quickly cooling magma inside earths crust.
What is intrusive igneous?
400
This geologist proposed that the continents were all one but drifted apart.
Who is Wegener?
500
The first era after today on our class timeline.
What is cenozoic era?
500
The youngest layer in the Grand Canyon.
What is Kaibab formation?
500
This scientist beleived the earth was slowly cooling from the outside in.
Who is Kelvin?
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