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Events
The Scale
The Eras
Vocab and Lesson Review
Random
100
This states that gradual and slow events helped shape Earth over a period of time.
Uniformitarianism
100
Paleozoic, Mesozoic, and Cenozoic are all what?
Eras
100
What time period is the longest of the geologic time scale?
Precambrian time
100
The principle that states that changes on Earth happen gradually.
Uniformitarianism
100
How does igneous rock form?
Cooling Lava
200
These are sudden events that have devastating effects on Earth.
Catastrophism
200
These are the shortest divisions of the geologic time scale.
Epochs
200
This is the era in which the dinosaurs lived.
Mesozoic Era
200
A chart that divides Earth's history into intervals of time.
Geologic Time Scale
200
What are the three processes that create sedimentary rock?
weathering, erosion, deposition
300
What is an example of uniformitarianism?
Check answers
300
These are the longest divisions of the geologic time scale.
Eons
300
In which era did the oceans begin to form as well as mountain ranges?
Paleozoic Era
300
The principle that states that geologic change happens suddenly.
Catastrophism
300
What are the five ways that fossils are preserved?
Amber, Frozen, Petrified, Rock, Asphalt
400
What is an example of catastrophism?
See answers
400
How do geologists determine when eras end?
Extinction
400
This is the era in which we currently live.
Cenozoic
400
The study of Earth's origins (beginnings) and processes is called...
Geology
400
These are taking from the arctic to analyze what climate was like in the past.
Ice Cores
500
What type of event did the dinosaurs experience, an example of uniformitarianism or catastrophism?
Explain
500
What is one reason that geologists created the geologic time scale?
Divide up Earth's history/mark changes in the fossil record
500
How is precambrian time different from the paleozic and mesozoic eras?
Did not end with extinction
500
Would it make sense to see an image in a history book of a caveman with a dinosaur? why/why not?
No, they are from different eras.
500
Why are igneous rocks best to use for radiometric dating?
Parent Isotopes