Our Changing Planet

What does absolute age refer to in geolog

• What does absolute age refer to in geology?

• The age of fossils within the rocks

• The determination of a rock's age in years

• The period when the rock was exposed to the surface

Which technology is used to determine the absolute age of some igneous and metamorphic rocks?

• Carbon dating

• Radioactive dating

• Straitgraphic dating

• Fossil dating

What are the types of crust?

• Continental

• Crystalline

• Basaltic

• Oceanic

What type of crust is less dense and thick?

• Continental

• Basaltic

• Crystalline

• Oceanic

WHy do continents float at a higher elevation than the ocean floor?

• Because continental crust is denser than oceanic

• Because the asthenosphere is denser than the continental crust

• Because the oceanic crust is less dense that the asthenosphere

• Because continental crust is less dense than oceanic crust

What does the law of superposition help scientist determine?

• The exact age of the rock

• The relative age of the rock

• The chemical composition of rock layers

• The density of rock layers

Tags

NGSS.MS-ESS1-4

According to the law of superposition, where is the oldest sedimentary rock layer?

• On the top of the sequence

• In the middle of the sequence

• On the bottom of the sequence

• Integrated within the rock layers

Tags

NGSS.MS-ESS1-4

How can scientists tell that a fault is younger than the layer it cuts across?

• The fault causes the layers to fold

• The fault has different rock types than the layers

• The fault is always on the top layer

• The fault separates the layers, indicating it occurs after they were deposited.

Tags

NGSS.MS-ESS1-4

Which kind of division of time on the geologic time scale has the name Mesozoic?

• A period

• An era

• An eon

• An epoch

Tags

NGSS.MS-ESS1-4

Which two features show evidence that compression has affected the rock in an area?

• A reverse fault

• A normal fault

• Folded layers

• Missing layers