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- 1. Fill in the Blank
The ________ ___ of a rock is its age compared to the ages of other rocks.
- 2. Multiple Choice
The relative age of a rock does not provide its absolute age.
True
False
- 3. Fill in the Blank
The ________ ___ of a rock is the number of years since the rock formed.
- 4. Multiple Choice
It may be impossible to know a rock's absolute age exactly.
False
True
- 5. Fill in the Blank
Geologists use the ___ __ _____________ to determine the relative ages of sedimentary rock layers.
- 6. Open Ended
Describe how the law of superposition determines rock layers age
- 7. Multiple Choice
To determine relative age, geologists also study (choose all that apply)
intrusions
extrusions
faults
gaps
- 8. Fill in the Blank
Lava that hardens on the surface is called an
- 9. Multiple Choice
An extrusion is always younger than the rocks below it.
True
False
- 10. Fill in the Blank
Magma cools and hardens into a mass of igneous rock called an _________.
- 11. Multiple Choice
An intrusion is always younger than the rock layers around and beneath it.
False
True
- 12. Fill in the Blank
A _____ is a break in Earth's crust.
- 13. Fill in the Blank
An ____________ is a gap in the geologic record. It shows where some rock layers have been lost.
- 14. Open Ended
Why are index fossils useful?
- 15. Fill in the Blank
Certain fossils, called _____ _______ help geologists match rock layers.
- Answer choicesTagsAnswer choicesTags