# Radiometric dating age of earth

It's simple: You must have started with a total of 80 chips, because you now have 70 10 = 80 total additives to your ice cream.Because your roommate eats half of the chips on any given day, and not a fixed number, the carton must have held 20 chips the day before, 40 the day before that, and 80 the day before that.You have a sneaky, but not especially clever, roommate who doesn't like the ice cream itself, but cannot resist picking out eating the chips – and in an effort to avoid detection, he replaces each one he consumes with a raisin.He is afraid to do this with all of the chocolate chips, so instead, each day, he swipes half of the number of remaining chocolate chips and puts raisins in their place, never quite completing his diabolical transformation of your dessert, but getting closer and closer.Calculations involving radioactive isotopes are more formal but follow the same basic principle: If you know the half-life of the radioactive element and can measure how much of each isotope is present, you can figure out the age of the fossil, rock or other entity it comes from.Scientists interested in figuring out the age of a fossil or rock analyze a sample to determine the ratio of a given radioactive element's daughter isotope (or isotopes) to its parent isotope in that sample." What you're actually looking for here is the temperature, which is fundamentally a description of how quickly molecules in the air are moving and colliding with one another, translated into a convenient number.

If someone has the equivalent of five drinks in his system, the body takes five times as long to clear the alcohol as it would if he had one drink in his system.Radiometric dating takes advantage of the fact that the composition of certain minerals (rocks, fossils and other highly durable objects) changes over time.Specifically, the relative amounts of their constituent Some things in nature disappear at a more or less constant rate, regardless of how much there is to start with and how much remains.Mathematically, from the above equations, this is N/N The trick is knowing which of the various common radioactive isotopes to look for.This in turn depends in the approximate expected age of the object because radioactive elements decay at enormously different rates.