Earth From the Inside-Out

Geologists use seismic waves to investigate Earth's interior with a method similar to which technique used by doctors to examine the inside of the human body?

• X-ray

• Ultrasound

• MRI

• CT scan

Tags

NGSS.MS-PS4-2

By studying changes in speed and direction of seismic waves as they travel in Earth, geologists can infer the ________ of Earth's interior.

• structure

• temperature

• age

• color

Tags

NGSS.HS-ESS2-3

Refer to the diagram showing seismic wave behavior in Earth's layers. Which type of seismic wave does NOT travel through the outer core?

• P-waves

• S-waves

The direction in and speed at which seismic waves travel can change when the waves travel from one type of material into another.

• True

• False

Tags

NGSS.MS-PS4-2

What occurs when a change in speed causes a wave to bend and change direction?

• Refraction

• Reflection

• Diffraction

• Absorption

Tags

NGSS.MS-PS4-2

A boundary that marks a density change between layers is called a ________.

• discontinuity

• convection cell

• rift zone

• plateau

Discontinuities can be identified by studying ________ waves.

• seismic

• sound

• light

• radio

Tags

NGSS.HS-ESS1-5

P-waves and S-waves travel through Earth for how many degrees of arc in all directions?

Tags

NGSS.MS-PS4-2

Between which degrees from the epicenter is nothing recorded?

• Between 105 and 140 degrees

• Between 0 and 30 degrees

• Between 180 and 200 degrees

• Between 50 and 80 degrees

What is the term for the 'dead zone' where nothing is recorded between 105 and 140 degrees from the epicenter?

• Shadow zone

• Focus zone

• Epicenter gap

• Seismic belt