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Which of the following has the eras in order from oldest to current?
This is when you use the comparative ages of rocks without using the absolute age.
Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic
Paleozoic
relative; absolute
examine fossils of plants and animals in different rock layers to see how these organisms have changed
radioactive decay is used to figure out the age of rocks
eons; eras; periods
The area was once covered by water.
The law of superposition is used for _______________ dating and radiometric dating is used for ______________.
This is when you use the comparative ages of rocks without using the absolute age.
Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic
Paleozoic
relative; absolute
examine fossils of plants and animals in different rock layers to see how these organisms have changed
radioactive decay is used to figure out the age of rocks
eons; eras; periods
The area was once covered by water.
The geologic time scale is broken into __________ that are broken into ______________ that are broken into _______________.
This is when you use the comparative ages of rocks without using the absolute age.
Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic
Paleozoic
relative; absolute
examine fossils of plants and animals in different rock layers to see how these organisms have changed
radioactive decay is used to figure out the age of rocks
eons; eras; periods
The area was once covered by water.
A layer of marine fossils is discovered in a desert environment. Which hypothesis best explains the discovery?
This is when you use the comparative ages of rocks without using the absolute age.
Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic
Paleozoic
relative; absolute
examine fossils of plants and animals in different rock layers to see how these organisms have changed
radioactive decay is used to figure out the age of rocks
eons; eras; periods
The area was once covered by water.
How would a biologist BEST determine the reason for extinction of a species?
This is when you use the comparative ages of rocks without using the absolute age.
Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic
Paleozoic
relative; absolute
examine fossils of plants and animals in different rock layers to see how these organisms have changed
radioactive decay is used to figure out the age of rocks
eons; eras; periods
The area was once covered by water.
Absolute dating is when
This is when you use the comparative ages of rocks without using the absolute age.
Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic
Paleozoic
relative; absolute
examine fossils of plants and animals in different rock layers to see how these organisms have changed
radioactive decay is used to figure out the age of rocks
eons; eras; periods
The area was once covered by water.
What's relative dating?
This is when you use the comparative ages of rocks without using the absolute age.
Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic
Paleozoic
relative; absolute
examine fossils of plants and animals in different rock layers to see how these organisms have changed
radioactive decay is used to figure out the age of rocks
eons; eras; periods
The area was once covered by water.
Which era was Age of Invertebrates?
This is when you use the comparative ages of rocks without using the absolute age.
Pre-Cambrian, Paleozoic, Mesozoic, Cenozoic
Paleozoic
relative; absolute
examine fossils of plants and animals in different rock layers to see how these organisms have changed
radioactive decay is used to figure out the age of rocks
eons; eras; periods
The area was once covered by water.
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