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Major changes in the environment _____.
organisms
all of the above
geologic time scale
both Superposition and Fossils in rock layers
pulled pieces of material together to form planets, including Earth.
from 3% to 20%
all of the above
Pangea, Rodinia
Geologic time is divided into units based upon types of _____.
organisms
all of the above
geologic time scale
both Superposition and Fossils in rock layers
pulled pieces of material together to form planets, including Earth.
from 3% to 20%
all of the above
Pangea, Rodinia
Two supercontinents, _____ and _____, had warm shallow oceans near the shores.
organisms
all of the above
geologic time scale
both Superposition and Fossils in rock layers
pulled pieces of material together to form planets, including Earth.
from 3% to 20%
all of the above
Pangea, Rodinia
Geologists organized the geologic time scale based on _____.
organisms
all of the above
geologic time scale
both Superposition and Fossils in rock layers
pulled pieces of material together to form planets, including Earth.
from 3% to 20%
all of the above
Pangea, Rodinia
The division of Earth’s history into smaller units makes up the _____.
organisms
all of the above
geologic time scale
both Superposition and Fossils in rock layers
pulled pieces of material together to form planets, including Earth.
from 3% to 20%
all of the above
Pangea, Rodinia
Little is known about much of Earth’s early history because _____.
organisms
all of the above
geologic time scale
both Superposition and Fossils in rock layers
pulled pieces of material together to form planets, including Earth.
from 3% to 20%
all of the above
Pangea, Rodinia
After the Sun formed, gravity _____.
organisms
all of the above
geologic time scale
both Superposition and Fossils in rock layers
pulled pieces of material together to form planets, including Earth.
from 3% to 20%
all of the above
Pangea, Rodinia
During the great Proterozoic eon, the percentage of oxygen in the atmosphere changed _____.
organisms
all of the above
geologic time scale
both Superposition and Fossils in rock layers
pulled pieces of material together to form planets, including Earth.
from 3% to 20%
all of the above
Pangea, Rodinia
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