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Geological Tour

Authored by Jamie Rother

5th - 6th Grade

Used 2+ times

Geological Tour
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19 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is Half-life?

The amount of time it takes for some of the nuclei in a sample of the isotope to decay
The amount of time it takes for half the electrons in a sample of the isotope to decay
The amount of time it takes for half the nuclei in a sample of the isotope to decay
the amount of time it takes to double the nuclei in a sample of the isotope to decay

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Radioactive carbon-14 is often useful in determining the absolute age of geologic samples because radioactive isotopes

decay at a regular rate

become less stable during decay

remain unchanged over time

stabilize after four half-lives

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which radioactive element is used to determine the absolute age of late Pleistocene animal remains?

rubidium-87

uranium-238

potassium-40

carbon-14

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The % of the parent isotope remaining after 1 Half Life.

50%

25%

12.5%

6.25%

5.

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

6.

MULTIPLE CHOICE QUESTION

1 min • 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

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Scientists use radioactive decay to measure...

relative time
absolute time
half-lives
time of day

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