Name 3 types of fossils and describe how they form

Cast fossils:

Cast fossils form when a mold is filled in. Once a hollow mold is present, they are filled in with minerals that form a solid.

Mold fossils:

Mold fossils are an imprint mark made in a rock or sediment. They are hollow, and are often leaves, teeth, claws, and more.

True Form fossils:

True Form fossils are big parts of an organism went through a process called petrification, in which their body part was replaced by minerals which hardened to become rock.

1. True form fossil

2. Trace fossil

3. Mold fossil

Fossils are formed in different ways, but most are formed when a plant or animal dies in a watery environment and is buried in mud and silt.