Vocabulary
Relative Age Dating
Absolute vs Relative Age dating
Uniformitarianism
Fossils and Mass Extinction
100
What has happened in the earth's past is still happening on the earth today.
What is Uniformitarianism
100
superposition
100
How old something is in years
Absolute Age
100
True or False:
Studying a river bed today can give you clues as to how the Grand Canyon formed.
True
100
True or False
All animals will form fossils when they die.
False
Soft bodies organisms (worms and slugs) do not make good fossils when they die. Also sharks skeletons are cartilage which does not form good fossils, but shark teeth form great fossils.
200
the numerical age, in years, of a rock or object.
absolute age
200
Cross Cutting Relationship
200
How old something is compared to other geologic features
Relative Age
200
True or False
Studying the environments today can lead to clues about the environments of the past.
True
200
Organism that is older than dinosaurs found fossilized in the rock layers. (hint: page 20 and 21 in your book)
Trilobites
300
the principle that in undisturbed rock layers, the oldest rocks are on the bottom.
superposition
300
Original horizontality
300
This rock is dated at 500 Million Years old by scientific methods such as Radiocarbon Dating.
Absolute Age
300
When an organism disappears from the fossil record and the rock layers.
Evidence of mass extinction
400
a piece of an older rock that becomes a part of a new rock.
inclusions
400
Inclusion
400
Relative Age
400
What the earth was like in the ancient past, which we can still study by looking at the environments of today.
Ancient Environments
500
the preserved remains or evidence of past living organisms.
fossils
500
lateral continuity
500
James Hutton
Scientist who developed the concept of Uniformitarianism
500
Animals that came after the dinosaurs went extinct.
Mammals.