Final answer:
Mold fossils are formed when an organism leaves behind an impression in sediment or rock. Imprint fossils are formed when an organism leaves behind a mark or imprint on a surface. Amber fossils are formed when an organism becomes trapped and preserved in tree resin that hardens over time. Radiometric dating is a method used to determine the age of fossils and other geological materials by using the decay of radioactive isotopes.
Step-by-step explanation:
Mold fossils are formed when an organism leaves behind an impression in sediment or rock. They are created when the organism decomposes and the remaining empty space is filled with minerals. For example, a mold fossil of a leaf would be the hollow space left behind in rock where the leaf used to be.
Imprint fossils are formed when an organism leaves behind a mark or imprint on a surface. They can include footprints, tracks, or even droppings. For example, an imprint fossil of a dinosaur track would be the mark left behind in mud that later hardened into rock.
Amber fossils are formed when an organism becomes trapped and preserved in tree resin that hardens over time. This often includes small insects or other small organisms. For example, an amber fossil could be a preserved mosquito trapped in amber.
Radiometric dating is a method used to determine the age of fossils and other geological materials by using the decay of radioactive isotopes. This allows scientists to calculate the age of a fossil based on the ratio of parent isotopes to daughter isotopes.