VOCABULARY!
Absolute age- the age, in years, of a rock or other objectsradioactive decay- the process of breaking down
half-life-the time it takes for half of the atoms to decay
radiometric dating- the radiometric isotopes in an organism breaks down from this you can tell how old something is. EXAMPLE: potassium-40 to argon-40 after about a billion years.
Uniformitarianism-this explains that earthly processes that happened a long time ago are similar to those that are happening today.
QUESTIONS 1-5
1) The layers below it are older and the layers above it are younger.
2) 17190 years
3) This principle states that earthly processes that happened a long time ago are similar to those that are happening today.
4) The radiometric isotopes in an organism's decay after billions of years to an isotope without radioativeness left in it.
5) It was never living!
No comments:
Post a Comment