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- 1. Fill in the Blank
Some elements break down, or ______ over time
- 2. Fill in the Blank
These elements release particles and ___________ because they are radioactive.
- 3. Fill in the Blank
To date the Earth, scientist use radioactive dating and evidence from rocks on Earth and the __________
- 4. Fill in the Blank
All plants and animals contain _________
- 5. Fill in the Blank
Carbon-14 has a half-life of only 5,730 years so it can't be used to date rocks or fossil older than about ____________ years
- 6. Multiple Choice
Select all the answers that apply.
Biological evidence of the age of the earth includes _____.
fossil evidence
gradual processes of rock formation
comparative anatomy
molecular clocks
radioactive dating of rocks
- 7. Multiple Choice
According to the ________sediment deposited into water will spread in a horizontal and continuous sheet
law of original lateral continuity
law of original horizontaility
law of faunal and floral succession
law of crosscutting (or intrusive) relationships
- 8. Multiple Choice
The law that states in a sequence of layered rocks, the crosscut, or intrusive feature, is younger than the layers it intercedes is the __________.
law of original horizontality
law of superposition
law of faunal and floral succession
law of cross-cutting (or intrusive) relationships
- 9. Multiple Choice
Geologists determine the absolute age of rocks using _____.
molecular clocks
radiometric dating
relative dating
the order of rock layers
- 10. Fill in the Blank
According to scientific evidence, the age of the earth is about _____billion years old.
- 11. Multiple Choice
A geologist is studying layers of rock. He finds a fossil with an imprint of a shelled animal. According to the law of faunal and floral succession, what new type of fossil would he most likely find next, in the layer of rock above it?
a fossil of a reptile
a fossil of an amphibian
a fossil of a human
a fossil of a fish
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