LIFE SCIENCE

Detailed explanation-1: -A cast is a hollow area in sediment in the shape of an organism.

Detailed explanation-2: -A cast is a solid copy of the shape of a fossil or organism.

Detailed explanation-3: -A cast is a solid copy of the shape of an organism. Molds and casts can preserve fine details. an organism become petrified. The term petrified means “turned into stone.” Petrified fossils are fossils in which minerals replace all of an organism, or a part, such as a dinosaur bone.

Detailed explanation-4: -Mold Fossil: Forms when sediments bury an organism and the sediments change into rock; the organism decays leaving a cavity in the shape of the organism.

Detailed explanation-5: -These fossils are called petrified fossils. Sometimes shells or other hard parts buried by sediments are gradually dissolved. A hollow space in sediment in the shape of an organism or part of an organism is called a mold. Sometimes a mold becomes filled in with hardened minerals, forming a cast.