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Absolute Dating
Test Description: Using lab knowledge to learn about absolute and radioactive dating.
Instructions: Answer all questions to get your test result.
1) In total there are 50 total atoms. If there are 36 undecayed atoms, how many decayed atoms are present?
A
14
B
50
C
36
D
22
2) Carbon-14 has how many protons?
A
6
B
12
C
8
D
14
3) What charge does a neutron carry?
A
Negative
B
None (neutral)
C
Half
D
Positive
4) In the lab, the M and Ms represent
A
Daughter atoms
B
Candy
C
Decayed atoms
D
Parent atoms
5) In the lab, the split peas represent
A
Decayed atoms
B
Vegetables
C
Undecayed atoms
D
Green M and Ms
6) How many atoms decay in one half life?
A
3/4, 75%
B
None, 0%
C
All, 100%
D
Half, 50%
7) Which isotope did the PHET simulation use?
A
Potassium-40
B
Candium
C
Carbon-14
D
Carbon-12
8) An isotope has a different number of
A
Neutrons
B
Protons
C
Atoms
D
Electrons
9) Decay refers to
A
How radioactive atoms change into stable atoms
B
How old something is
C
Creating bigger atoms
D
The amount of atoms in a sample
10) After two half lives, what percentage of parent atoms remain?
A
25%
B
0%
C
50%
D
12.%
*select an answer for all questions
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