Science Chapter 2 Lesson 1 and 2 Fossils

A fossil is _________.

How do fossils form? (select all that apply)

• They form when living things die and are buried by sediment,

• They form when organisms are alive and they leave their footprint.

• The form when sediment slowly hardens into rock and preserves the shape of the organism.

• They form when sediment washes over the dead organism and doesn't bury it.

Sediment is made up of............​ (a)   ​ (b)   ​ (c)  

• rock particles
• remains of living things
• sand
• water
• plants

Where do most fossils form?

• in or near water

• in the open air

• on a sidewalk

When an organism dies its soft parts form the fossil.

• True

• False

The following are reasons why the soft parts of an organism do not usually form a fossil (EXCEPT)

• because they decay quickly

• because they are eaten by animals

• because they are strong like bones and teeth

Hard parts are all of the following (EXCEPT)

• bones

• teeth

• skin

• seeds

• shells

The types of fossils are......​ (a)   ​ (b)   ​ (c)   ​ (d)   ​ (e)  

• molds/casts
• preserved remains
• petrified fossils
• carbon films
• trace fossils
• minerals
• skin
• ice

A mold is a type of fossil that ......

• is a hollow area in sediment in the shape of an organism or part of it.

• is the solid copy of the shape of an organism.

A cast is a type of fossil that ......

• is a hollow area in sediment in the shape of an organism or part of it.

• is the solid copy of the shape of an organism.