Mahoney - Relative/Absolute Age & Half Life Tasks Quiz

5 Questions | Total Attempts: 157  Settings  • 1.
How can scientists measure the approximate age of rocks in years?
• A.

Using relative dating

• B.

• C.

Using half life

• D.

By counting tree rings

• 2.
The half-life of Mahoneyum is 700 years.  If we begin with a 400g sample, how many grams of Mahoneyum will remain after 3500 years?
• A.

25g

• B.

12.5g

• C.

6.25g

• D.

3.125g

• 3.
The half-life of Mahoneyum is 700 years.  If we begin with a 400g sample, how long will it take for 25 grams of Mahoneyum to be remaining (UNdecayed)?
• A.

1400 years

• B.

2100 years

• C.

2800 years

• D.

3500 years

• 4.
The half-life of Mahgebsum is 200 days.  If we begin with a 20mg sample, how long will it take for the substance to completely decay?
• A.

400 days

• B.

600 days

• C.

800 days

• D.

The sample will never completely decay.

• 5.
The half-life of Mahgebsum is 200 days.  If we begin with a 20mg sample, how many half-lives will the sample have gone through when there is 2.5mg of parent Mahgebsort material remaining?
• A.

2 half-lives

• B.

3 half-lives

• C.

4 half-lives

• D.

It's impossible to tell how many half-lives the sample has gone through.

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