Your SlideShare is downloading. ×
  • Like
Ppt 12.3 earth
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Now you can save presentations on your phone or tablet

Available for both IPhone and Android

Text the download link to your phone

Standard text messaging rates apply
Published

 

Published in Technology , Spiritual
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
No Downloads

Views

Total Views
409
On SlideShare
0
From Embeds
0
Number of Embeds
1

Actions

Shares
Downloads
5
Comments
0
Likes
1

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Earth Science
    Dating with Radioactivity 12.3
  • 2. Radioactivity
    The spontaneous decay of certain unstable atomic nuclei.
  • 3. Half-life
    The time required for one half of the atoms of a radioactive substance to decay.
  • 4. Radiometric Dating
    The procedure of calculating the absolute ages of rocks and minerals that contain radioactive isotopes.
  • 5. Radiocarbon Dating
    Method for determining age by comparing the amount of carbon-14 to the amount of carbon-12 in a sample
  • 6. What is Radioactivity?
    When nuclei are unstable, they spontaneously break apart, or decay, in a process called radioactivity.
  • 7. What is half-life?
    A half-life is the amount of time necessary for one half of the nuclei in a sample to decay to its stable isotope.
  • 8. What is radiometric dating?
    An accurate radiometric date can be obtained only if the mineral remained in a closed system during the entire period since its formation.
  • 9. How is carbon-14 used in radiometric dating?
    When an organism dies, the amount of carbon-14 gradually decreases as it decays. By comparing the ratio of carbon-14 to carbon-12 in a sample, radiocarbon dates can be determined.