Unit 2 Test Review

Front

What type of seismic wave can travel through solids only?

Back

Secondary waves

Front

What causes the magnetic patterns in rock on the sea floor?

Back

The sea floor spreads and cyclical (cycles or patterns of) polarity reversals.

Front

Which layer of the Earth is molten (liquid metal)?

Back

Outer core

Front

What is the best evidence that Earth's outer core is liquid?

Back

S waves are diffracted (do not travel through) the outer core.

Front

What conclusion can be drawn about the absence of convection currents in the lithosphere?

Back

The lithosphere is too rigid for the currents to flow.

Front

What are Primary waves?

Back

Seismic waves that can travel through solids, liquids, and gases.

Front

What is the lithosphere?

Back

The rigid outer layer of the Earth, consisting of the crust and the upper mantle.

Front

What is the outer core primarily composed of?

Back

Liquid iron and nickel.

Front

What is the significance of P waves in understanding the Earth's interior?

Back

P waves can travel through both solids and liquids, indicating the presence of liquid in the outer core.

Front

What is the process of sea floor spreading?

Back

The formation of new oceanic crust as magma rises to the surface at mid-ocean ridges.