Record of the Earth's History

What is trace or remains of an organism preserved in the earth's crust?

• geologic time

• fossil

• fault

• tectonic plates

During the Cenozoic Era, the Great Lakes basins were carved out by ______________.

• glaciers

• rivers

• wind

• mudslides

According to the principle of crosscutting relationships, a rock feature than cuts across other rock layers is _____________ than the rock layers.

• older

• younger

• harder

• sharper

What is an impression left in a rock by an organism?

• petrification

• half-life

• mold

• index fossil

What is the process by which original plant or animal parts are replaced by minerals?

• Mesozoic

• petrification

• index fossil

• relative dating

What kind of fossil forms when minerals fill a mold?

• cast

• index fossil

• regular fossil

• mold

What is the total amount of time since the earth was formed?

• half-life

• eons

• century

• geologic time

Which method is used to determine how old a rock layer is by comparing it to another rock layer?

• relative dating

• superposition

• absolute dating

• crosscutting

What method is used to figure out the actual age of a rock or fossil?

• relative dating

• superposition

• absolute dating

• crosscutting

What sort of fossil provides clues to the age of the rock in which the fossil occurs?

• petrification

• index fossil

• mold

• cast