Earth Science Reference Table Radioactive Decay Data
Authored by Charles Martinez
Other Sciences
9th - 12th Grade
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16 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Radiometric dating is possible because the rates of decay of radioactive isotopes _____.
change over time
change from place to place
are constant
vary widely
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The time it takes for 50% of the nuclei in a radioactive sample to decay to its stable isotope is called _____.
the daughter product
geologic time
the half-life
the half-time
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
You find a rock sample with radioactive atoms present. If 12.5% of the original radioactive atoms were present, how many half-lives has the rock been around for? (Hint, at Half-Life = 0, you start with 100%)
zero
1
2
3
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
You find a rock sample with radioactive atoms present. If 25% of the original radioactive atoms were present, how many half-lives has the rock been around for? (Hint, at Half-Life = 0, you start with 100%)
zero
1
2
3
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there have been two half-lives?
25 years
200 years
400 years
800 years
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suppose you found a material in which 12.5% of the original radioactive atoms were still present. If the half-life of an atom is 60 years, how old is the material?
30 years old
60 years old
120 years old
180 years old
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Using ESRT (A) [Radioactive Decay Data], what is the half-life in standard notation of Uranium-238?
4,500 years
450,000 years
4,500,000 years
4,500,000,000 years
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