Seismic Waves (H)

A P wave causes the

• primary tremors

• secondary tremors

• tertiary tremors

Which type of seismic wave is longitudinal?

• S-waves

• P-waves

What type of wave is an S-wave?

• Longitudinal

• Transverse

What happens to both S and P waves in the mantle?

• reflection

• diffraction

• refraction

At what boundary do P waves refract at?

• mantle and inner core

• mantle and outer core

• crust and mantle

What is the device called that measures seismic activity?

• seismometer

• seismeter

• sizemometer

What is a shadow zone?

• an area where all the P or S waves are detected

• an area where no P or S waves are detected

• an area where no P waves are detected

Which of these is found at the surface of the earth?

• epicentre

• focus

Seismic waves prove that the Earth has a

• solid inner core surrounded by a liquid outer core

• liquid inner core surrounded by a liquid outer core

• liquid inner core surrounded by a solid outer core

What is the mantle surrounded by?

• the Earth

• the inner core

• the Earth's crust