The Structure and Age of the Earth

What is the definition of LAW OF CROSSCUTTING?

• Any method of measuring the age of an event or object in years.

• Fossils that are used to estimate the absolute age of the rock layers in which they are found. These organisms must have lived during a short time span, have unique features, and be common over large areas.

• Younger rocks lie above older rocks, if layers are left undisturbed.

• Faults or intrusions are younger than any layer of rock they cut through.

What is the definition of GEOLOGIC COLUMN?

• An ordered arrangement of rock layers that is based on the relative ages of the rocks (older rocks are at the bottom).

• Any method of measuring the age of an event or object in years.

• Fossils that are used to estimate the absolute age of the rock layers in which they are found. These organisms must have lived during a short time span, have unique features, and be common over large areas.

• Stable isotope that forms after the parent isotope decays.

Tags

NGSS.MS-ESS1-4

What is the definition of INDEX FOSSIL?

• Any method of determining whether an event or object is older or younger than other events or objects.

• The standard method used to divide Earth's long natural history into manageable intervals of time.

• Fossils that are used to estimate the absolute age of the rock layers in which they are found. These organisms must have lived during a short time span, have unique features, and be common over large areas.

• The trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock.

What is the definition of CATASTROPHISM?

• Any method of determining whether an event or object is older or younger than other events or objects.

• A principle that geologic processes that occurred in the past can be explained by current geologic processes.

• The scientific study of the origin, history, and structure of Earth and the processes that shape Earth.

• The principle that states that all geologic change occurs suddenly.

Tags

NGSS.MS-ESS3-2

T/F: Geologist use radioactive dating to find the absolute age of rocks

• True

• False

Tags

NGSS.MS-ESS1-4

Scientist think the Earth is ___ years old.

• 4,500

• 45,000

• 4.5 million

• 4.4 billion

Tags

NGSS.MS-ESS1-4

What do we call the center of the Earth?

• Mantle

• Crust

• Apple

• Core

What layer is between the inner core and the mantle?

• asthenosphere

• crust

• outer core

• lithosphere

Which two metals are thought to be found in the core?

• iron and steel

• iron and nickel

• gold and silver

• iron and copper

Tags

NGSS.MS-PS1-1

Which layer of the core is solid?

• inner

• outer