Water is added to the atmosphere through I think "Sublimation"
~Hope this helps~
Your skin has 3 layers. The top layer is called the epidermis. The middle layer is called the dermis. The bottom layer is called the subcutaneous fat.
The answer is the radioactive isotope reacts in the same way as stable isotopes in the chemical reactions in the body.
C-14 and C-12 are carbon isotopes used to measure the approximate age of organic remains. C-12 is stable, and it does not break down into other elements over time. C-14 is not stable. It breaks down into N-14. But, in the body, the radioactive isotope reacts in the same way as stable isotopes in the chemical reactions.
Basically, the law states that an object at rest stays at rest and an object continues its state of motion until an external force acts on it. For example, a ball rolling down a hill will continue to roll unless friction or another force stops it.
