Term
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Definition
| Fossils form in this type of rock. |
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Term
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Definition
T or F
Ice is one of the best preservers of prehistoric life. |
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Term
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Definition
[image]
The fossil pictured above is of what type? |
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Term
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Definition
T or F
Footprints provide direct evidence. |
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Term
gas levels in the ancient atmosphere
whether it was a rainy or dry year
the scale of a historic volcanic eruption |
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Definition
| Name 3 types of natural evidence that tree rings and ice cores may provide. |
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Term
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Definition
| Sedimentary rock formations, if undisturbed, always have the youngest rock at the deepest layers. |
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Term
| tree dies... falls over... gets buried... wood rots... water deposits minerals... stone fossil forms |
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Definition
| Describe how petrified wood forms. |
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Term
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Definition
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Term
| LaBrea Tar Pits, Los Angeles, California |
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Definition
| This is one of the most famous fossil sites in the world. |
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Term
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Definition
Carbon film fossils provide direct evidence, and are often found in ice.
T or F |
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Term
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Definition
This fossil provides indirect evidence of an animal's presence in an area, and is called what?
[image] |
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Term
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Definition
[image]
This image shows an undisturbed sedimentary formation.
T or F |
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Term
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Definition
T or F
The absolute age of rocks can be determined through radioactive dating. |
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Term
D.
They only show relative age. |
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Definition
Which of the following is NOT true when talking about index fossils?
A.
They are common.
B
They are world-wide.
C
They are specific to one period of geologic time.
D
They show the absolute age of the surrounding rock. |
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Term
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Definition
| The idea that Earth is an always changing place, and the same forces that changed it in the past continue to change it today, is called what? |
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Term
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Definition
| Life first appeared on Earth how long ago? |
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Term
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Definition
| Modern humans evolved how long ago? |
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Term
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Definition
| Earth's history is divided into 4 ______________. |
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Term
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Definition
| Mammals became a main category of life during the ________________ era. |
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Term
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Definition
| Currently, we live in what period of geologic time? |
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