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G2 Science: Amazing Waves
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Seismic Waves
Main Types
Sub Types
Seismic Wave
- is the energy that radiates in all directions from the focus in the form of waves that are recorded in seismograph.
Definition
Body Wave
Body Waves
- is a seismic wave that travels through the Earth rather than across its surface. These waves are higher frequency than surface waves.
Surface Wave
Surface Waves
- is a seismic wave that is trapped near the surface of the earth. Surface waves travel more slowly through Earth material at the planet's surface and are predominantly lower frequency than body waves.
Primary Waves (P-Waves)
P-Waves
- Also called primary or compressional waves, travel by particles. Force the ground to move backward and forward as they are compressed and expanded.
Secondary Waves (S-Waves)
S-Waves
- Also called secondary or shear waves. Is a pulse energy that travels slower than a P-wave. S-wave move as shear or transverse waves and force the ground to sway side to side.
Love Wave
Love Waves
- is a surface wave having a horizontal motion that is transverse (or perpendicular) to the direction the wave is traveling.
Rayleigh Wave
- are characterized by elliptical motion perpendicular to the surface.
Rayleigh Waves
Guide Questions:
Guide Questions
Q1. Differentiate surface waves from body waves.
The difference between surface waves from body waves is that surface waves can only travel through the surface of the Earth while body waves can travel not just through the Earth but also through liquids and gases. And also body waves move faster than surface waves making them appear in the seismogram first.
Guide Questions:
Next Question
Q2. Which type pf waves do you think were useful to seismologists in their study of the Earth's interior? Explain your Answer.
The body waves were useful to scientists since they are the only kind of waves that can provide information about the Earth's deep interior. P waves (one type of body waves) can travel to solids, liquids, and gases while S waves can not travel to liquids making scientists conclude that the outer core is liquid. The scientists studied how the waves traveled through the layers of the Earth and made conclusions.
Group 2
Leader: Grado, Jerlie
Members:
Buen, Cholo
Clemente, Shanel Andrei
Dela Cruz, John Alexander
Dones, Aizhelle Anne
Panganiban, Dustine Jhaey
Salonga, Therese