12/06: Earth's Interior Questions

Front

What is the density of Earth's crust compared to the outer core and mantle?

Back

The density of Earth's crust is less than the density of both the outer core and the mantle.

Front

What type of wave is represented by Wave A in seismic activity?

Back

Wave A represents a compressional wave.

Front

What type of wave is represented by Wave B in seismic activity?

Back

Wave B represents a shear wave.

Front

What is the greatest earthquake hazard to homes built on which type of surface?

Back

The greatest earthquake hazard exists when homes are built on silt and mud.

Front

How do the travel rates of P-waves compare to S-waves?

Back

P-waves travel at a faster rate and take less time than S-waves.

Front

Which graph best shows the inferred density of Earth's interior as depth increases?

Back

Graph D best shows the inferred density of Earth's interior as depth increases.

Front

What are P-waves?

Back

P-waves, or primary waves, are compressional seismic waves that travel faster than S-waves.

Front

What are S-waves?

Back

S-waves, or secondary waves, are shear seismic waves that travel slower than P-waves.

Front

What is the relationship between seismic wave speed and the material they travel through?

Back

Seismic waves travel faster through denser materials.

Front

What is the composition of the Earth's crust?

Back

The Earth's crust is primarily composed of igneous, metamorphic, and sedimentary rocks.