Free Printable REVIEW Quiz7 Radioactive Dating

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REVIEW Quiz7 Radioactive Dating

Total questions: 13

Worksheet time: 53mins

Name

Class

Date

You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years.
How many grams are left after 1 half life?

100 grams

25 grams

2 grams

50 grams

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

If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?

1 half-life

2 half-lives

3 half-lives

4 half-lives

What percentage of rubidium-87 atoms will be left after four half lives?

25.0%

12.5%

6.25%

3.125%

¹⁴₆C has a half life of 5730 years, how many years would it take the 4.0 g sample to decay to 0.25 g?

4 years

5730 years

22,920 years

28,650 years

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

50%

25%

12.5%

6.25%

What makes something radioactive?

elements with an atomic number above 80

unstable nuclei

contaminated sewage

stable nuclei

high energy electrons

Radiometric dating is possible because the rates of decay of radioactive isotopes _____.

change over time

change from place to place

are constant

vary widely

How does absolute age differ from relative age?

only absolute dating indicates which rock is older than another

only absolute dating finds the age in years

only relative dating finds the age in years

10.

All plants and animals contain carbon.

True

False

11.

During ___________________, the atoms of one element break down to form atoms of another element.

radioactive dating

rock formation

radioactive decay

erosion

12.

Why wouldn't you use Carbon 14 dating to find the age of a piece of igneous rock?

igneous rock is too young

igneous rock can't be dated

igneous rock has no carbon because it wasn't a living thing

igneous rock doesn't age

13.

How much of a sample would be left after 6 half-lives?

about 10%

about 12%

about 3%

about 1.5 %

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REVIEW Quiz7 Radioactive Dating

Total questions: 13

Worksheet time: 53mins

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