Fossils

Millions of years ago, the remains of dead plants and animals were buried by sediments. Through the action of time and pressure over millions of years, these remains changed form. We now call these changed remains

• Fossil fuels

• Natural gas

• Renewable resource

• Nonrenewable resources

A person that studies the forms of life existing in prehistoric times by investigating the fossils of plants, animals, and other organisms is known as a

• Investigator

• Paleontologist

• Researcher

• Pathologist

Tags

NGSS.MS-LS4-1

___________ ___________ show evidence of the activity of ancient organisms, such as tracks or nests.

• dead fossils

• Mold fossils

• Cast fossils

• Trace fossils

What are the three common types of fossils?

• Mold, cast, and trace

• liquid, cast and trace

• solid, mold and cast

• gas, cast and mold

In layers of rock and their fossils, which layer contains the oldest fossils?__

• bottom of the sea.

• The ones on the bottom

• desert

• plant

Tags

NGSS.MS-ESS1-4

A fossil that is formed by sediments filling up a mold is a(n)

• Cast fossil

• Mold fossil

• Trace fossil

• Amber

An animal dies and is buried under a mudslide. After its flesh decays, special conditions allow the bones to be replaced by minerals forming a copy of the bone that was once there. This type of fossil is a(n

• Old fossil

• Cast fossil

• Fossil fuel

• Mold fossil

What is the process by which organic material becomes fossilized over millions of years?

• Carbonization

• Petrification

• Metamorphosis

• Crystallization

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Which type of fossil is formed when an organism is buried and then decays, leaving an empty space in the shape of the organism?

• Cast fossil

• Mold fossil

• Trace fossil

• Amber fossil

What is the primary difference between a mold fossil and a cast fossil?

• A mold fossil is a 3D replica, while a cast fossil is a hollow impression.

• A mold fossil is a hollow impression, while a cast fossil is a 3D replica.

• A mold fossil contains organic material, while a cast fossil does not.

• A mold fossil is formed in sedimentary rock, while a cast fossil is not.