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What is an organism that no longer exists on Earth called?
gradually (slowly)
dry and freezing temperatures
the preserved remains or traces of an organism.
to divide Earth’s history into manageable parts.
extinct
The desert was once underwater.
both simple and complex organisms.
There are no rock layers that have fossils of both trilobites and dogs remains.
Stuart wants to preserve the remains of a dead organisms. What is the best environment for fossil formation?
gradually (slowly)
dry and freezing temperatures
the preserved remains or traces of an organism.
to divide Earth’s history into manageable parts.
extinct
The desert was once underwater.
both simple and complex organisms.
There are no rock layers that have fossils of both trilobites and dogs remains.
If you found a seashell fossil in the desert, what would it MOST LIKELY tell you?
gradually (slowly)
dry and freezing temperatures
the preserved remains or traces of an organism.
to divide Earth’s history into manageable parts.
extinct
The desert was once underwater.
both simple and complex organisms.
There are no rock layers that have fossils of both trilobites and dogs remains.
A fossil is ________________.
gradually (slowly)
dry and freezing temperatures
the preserved remains or traces of an organism.
to divide Earth’s history into manageable parts.
extinct
The desert was once underwater.
both simple and complex organisms.
There are no rock layers that have fossils of both trilobites and dogs remains.
How do geologists use the geologic time scale?
gradually (slowly)
dry and freezing temperatures
the preserved remains or traces of an organism.
to divide Earth’s history into manageable parts.
extinct
The desert was once underwater.
both simple and complex organisms.
There are no rock layers that have fossils of both trilobites and dogs remains.
Geologic changes occur _______________.
gradually (slowly)
dry and freezing temperatures
the preserved remains or traces of an organism.
to divide Earth’s history into manageable parts.
extinct
The desert was once underwater.
both simple and complex organisms.
There are no rock layers that have fossils of both trilobites and dogs remains.
Geologists could study the geologic record to determine __________.
gradually (slowly)
dry and freezing temperatures
the preserved remains or traces of an organism.
to divide Earth’s history into manageable parts.
extinct
The desert was once underwater.
both simple and complex organisms.
There are no rock layers that have fossils of both trilobites and dogs remains.
Trilobites and dogs did not exist in the same geologic era. How do scientists know this?
gradually (slowly)
dry and freezing temperatures
the preserved remains or traces of an organism.
to divide Earth’s history into manageable parts.
extinct
The desert was once underwater.
both simple and complex organisms.
There are no rock layers that have fossils of both trilobites and dogs remains.
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