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- 1. Multiple Choice
Earth elements decay and change into another element in a process called_____________.
radiation
isotope
radioactive decay
half-life
- 2. Multiple Choice
The __________of rocks is the numerical age and real age of rocks.
relative age
half-life
absolute age
earth age
- 3. Multiple Choice
Geologist use _________ to determine the absolute age of rocks.
absolute age dating
relative age dating
radiation dating
radioactive dating
- 4. Multiple Choice
All organisms contain the element_________, so it is used to find the ages of fossils.
carbon-14
carbon-12
carbon
carbon age
- 5. Multiple Choice
Geologist use the time it takes for a radioactive isotope to decay to half its original mass called a___________.
radioactive decay
isotope
half-life
carbon dating
- 6. Multiple Choice
Radioactive dating shows ___________ rocks are 4.6 billion years old.
Earth rocks
Moon rocks
Earth and Moon rocks
Radioactive rocks
- 7. Multiple Choice
The moon was made from a piece of _________ .
Moon
Earth
radioactive rocks
rock
- 8. Multiple Choice
Life on Earth has existed for more than _____________ years.
3.6 million
3 thousand
3 billion
4.6 billion
- 9. Multiple Choice
A long-lived natually occurring radioactive carbon isotope:
half-life
Isotope
Carbon-12
Carbon-14
- 10. Multiple Choice
The thermal energy transferred by electromagnetic waves is called ____________________
half-life
radiation
radioactive decay
carbon-14
- 11. Multiple Choice
Using the graph, How much Carbon-14 does a 10,000 yr old fossil emit?
10 %
20 %
30 %
40 %
- 12. Multiple Choice
How much Carbon-14 would a foosil that is 6,000 yrs old?
about 40%
about 50%
about 60%
about 70%
- 13. Multiple Choice
A fossil emitting 90% carbon-14, would be __________ yrs old.
1,000
2,000
3,000
4,000
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