Choose three types of fossils. Describe their appearance AND how they were formed.

Fossils are the preserved biological remains and activities of ancient animals and plants. Paleontologists study fossils to determine anatomical and behavioral characteristics of past organisms. Fossils are classified into three categories of body, trace and chemical. The fossilization process is rare and occurs through a combination of biological, chemical and physical processes. Fossilization processes are molds, casts, drying, freezing, petrification, polymerization and carbonization.