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Take out your study guide. Continue on page 42: and answer this
- I don’t get it! What one thing (or two)
do you just not get about paleontology?
Review Game
What is the death of every member of a species called?
Extinction
What process compares one rock layer with another in sequence to determine age?
Relative Dating
Which era do we live in? Cenozoic Era
What law says that the geologic processes that occur today also occurred in the past?
Law of Uniformitarianism
What is a missing layer of rock called?
Unconformity
What is the study of past life using fossils?
Paleontology
What law says that younger rock is on top of older rock?
Law of Superposition
What is amber? Hardened tree sap
What is an example of a trace fossil? Footprint, tail print
At what rate does geologic change occur?
Slowly
How do we know that the environmental conditions on the Earth have changed?
By looking at the fossil record
A trilobite was buried by ocean sediment and left a cavity. What type of fossil is this?
Mold
How do scientists find the absolute age of a fossil or rock?
By radioactive dating
What is the Law or Original Horizontality?
Sediments are laid down in horizontal layers
What is the geologic column? The layer of rocks that shows us the
Earth’s history
If you find the fossil of a fish on the top of the mountain, what can you learn about the history of the mountain?
It was once under water
What era is the Age of Reptiles? Mesozoic Era
How do petrified fossils form? By all the tissue in an organism being
replaced by minerals
What type of rocks usually contain fossils?
Sedimentary
How many years ago did dinosaurs become extinct?
About 65 million years ago