Question

Seismic waves from volcanic activity include:

A) Only one type of wave
B) Waves with different periods
C) Ultrasonic waves
D) Radio waves

Answer 1

Seismic waves from volcanic activity include pressure waves (P-waves) and shear waves (S-waves). These waves propagate through the earth with different speeds and characteristics, allowing geologists to study earthquake activity.

Step-by-step explanation:

Seismic waves from volcanic activity include two types of waves: pressure waves (P-waves) and shear waves (S-waves). P-waves are longitudinal waves that propagate through the earth by compressing and expanding the material they pass through.

S-waves are transverse waves that propagate by shaking the material perpendicular to the direction of wave travel. Both P-waves and S-waves have different speeds and characteristics, allowing geologists to study earthquake activity and determine the distance to the earthquake's epicenter.