Radiometric dating definition for kids

Petrification happens when the organic material is slowly replaced by minerals. Making a fossil is tricky and the conditions have to be just right.

Some fossils are the actual remains of a plant or animal that has been frozen in ice or trapped in a substance like sap. Despite this, there are several different ways for a living thing to become a fossil.

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The two fossil categories can be broken down further.

When we think of fossils, the first things that come to mind are the bones of dinosaurs; but a fossil can be anything.

Footprints, flowers, even droppings; all of these things can be turned into fossils under the right conditions.

A cast fossil is a fossil made when an organism that is buried in sediment decays and leave behind a mold, or hollow impression in its shape.

A cast fossil is like a mold fossil, but in the case of a cast fossil the mold has been filled with minerals.

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