Relative rock dating worksheet
This is what archaeologists use to determine the age of human-made artifacts. The half-life of carbon-14 is only 5,730 years, so carbon-14 dating is only effective on samples that are less than 50,000 years old.
Dinosaur bones, on the other hand, are millions of years old -- some fossils are billions of years old.
Fossils can't form in the igneous rock that usually does contain the isotopes.
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These changes typically occur so slowly that they are barely detectable over the span of a human life, yet even at this instant, the Earth's surface is moving and changing.If a student suspects a mineral is Halite, they give it to me.Despite seeming like a relatively stable place, the Earth's surface has changed dramatically over the past 4.6 billion years.However, by itself a fossil has little meaning unless it is placed within some context.The age of the fossil must be determined so it can be compared to other fossil species from the same time period.