Carbon dating explained for kids
Carbon dating explained for kids - flirt amor dating
Carbon-14 has a half-life of 5,730 ± 40 years, meaning that every 5,700 years or so the object loses half its carbon-14.Samples from the past 70,000 years made of wood, charcoal, peat, bone, antler or one of many other carbonates may be dated using this technique.
Green plants absorb the carbon dioxide, so the population of carbon-14 molecules is continually replenished until the plant dies.
Fossils are the remains of animals or plants that lived a long time ago.
When we think of fossils, the first things that come to mind are the bones of dinosaurs; but a fossil can be anything.
Groundwater seeps into the newly made stone and dissolves the bone, leaving behind a mold.
The mold is an empty cavity, and can be filled with minerals that become a cast for the long dissolved bone.
A cast fossil is like a mold fossil, but in the case of a cast fossil the mold has been filled with minerals.
Imprint fossils are made when organic - or living - material is pressed into sediment, but does not decay like with a cast or mold, and the organic material leaves an impression in the formed rock.
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.
If the fossil was once an animal, the animal has to die.
After that, depending on where the animal dies, the process of fossilization can occur in different ways.
For most fossils there are three basic things that are needed: sediment, pressure, and time.
Love-hungry teenagers and archaeologists agree: dating is hard.