Chapter 8 Earthquakes and Earth's Interior

Front

What is seismic shaking?

Back

Ground vibrations caused by seismic waves.

Front

What did studies of P and S waves help scientists determine?

Back

The outer core is liquid.

Front

What generates Earth's magnetic field?

Back

The outer core.

Front

What are P waves?

Back

Push-pull waves that push (or compress) and pull (or expand) particles in the direction the waves travel.

Front

What is a fault in geological terms?

Back

A fracture in Earth where movement has occurred.

Front

What are S waves?

Back

Waves that shake particles at right angles to the waves’ direction of travel.

Front

What is the lithosphere?

Back

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

Front

What is the asthenosphere?

Back

The semi-fluid layer of the mantle beneath the lithosphere.

Front

What is the difference between the inner core and outer core?

Back

The inner core is solid, while the outer core is liquid.

Front

What is a tectonic plate?

Back

A large slab of Earth's lithosphere that moves and interacts with other plates.