life science
posted by claire .
I cant grasp half life  the study guide question is how is half life dating used by scientists 
I have 2 lines to write an answer

Thank you for using the Jiskha Homework Help Forum. Although you don't reference this specifically, do you mean the game?
http://en.wikipedia.org/wiki/Halflife 
Since this is not my area of expertise, I searched Google under the key words "'half life'" to get these possible sources:
http://en.wikipedia.org/wiki/Halflife
http://www.colorado.edu/physics/2000/isotopes/radioactive_decay3.html
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps. Thanks for asking.
Respond to this Question
Similar Questions

halflife
1. The halflife of a firstorder reaction is 9.89 minutes. How many minutes will have elapsed after 27 halflives? 
chemistry
If there are 80 milligrams of a radioactive element decays to 10 milligrams in 30 minutes then what is the elements half life in minutes? 
linear/exponential
This question involves the halflife formula. In this exercise, we are to give a halflife for an exponentially decaying quantity. Need answer to the following: The halflife of a drug in the bloodstream is 4 hours. By what factor … 
help huge test friday science
I cant grasp half life  the study guide question is how is half life dating used by scientists  I have 2 lines to write an answer 
Chemistry
Mefenamic acid (Ponstan Forte) has a half life of 2 hours. Naproxen has a half life of 12 to 17 hours. Both are anti inflammatory drugs of apparently similar nature but could someone please explain the difference in half life? 
Math/Radioactive Dating
How would I calculate the age of a rock only given the amount of each in grams and halflife? 
Chemistry
Uranium238 has half life of 4.51 * 10^9 years Uranium234 has half life of 2.48 * 10^5 years Thorium230 has half life of 8.0 * 10^4 years Radium226 has half life of 1.62 * 10^3 years Lead210 has half life of 20.4 years. The rate … 
Earth Science
Why is potassiumargon dating most applicable to dating very old rocks? 
physics
If the physical halflife of sulfur35 is 87.1 days, and the biologic halflife in the testicle is 632 days, what is its effective halflife in this organ? 
Chem 2 help
what is the significance of calculating the half life of a reaction?