Mahoney - Relative/Absolute Age & Half Life Tasks Quiz

5 Questions | Total Attempts: 157

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Mahoney - Relative/Absolute Age & Half Life Tasks Quiz


Questions and Answers
  • 1. 
    How can scientists measure the approximate age of rocks in years?
    • A. 

      Using relative dating

    • B. 

      Using radioactive waste

    • 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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