Seismic Waves and Earth’s Interior Eric Angat Environmental Science

FOCUS - Origin of the earthquake, happens underground. Fault line Transform Boundary Seismic waves Epicenter. Earthquake felt on the surface

Seismic Waves are produced by Earthquakes Body WavesSurface Waves Slowest Travels only on Earth’s surface P-Wave Fastest Can travel through Earth S-Wave Fast Can travel through Earth, but not through the core. 1.What are the two types of seismic waves? 2.What are the two types of body waves? 1.What are the two types of seismic waves? 2.What are the two types of body waves?

Seismic Waves are produced by Earthquakes Body WavesSurface Waves Slowest Travels only on Earth’s surface P-Wave Fastest Can travel through Earth S-Wave Fast Can travel through Earth, but not through the core. 3. What produces seismic waves? 4. Which seismic wave can travel through earth? 3. What produces seismic waves? 4. Which seismic wave can travel through earth?

Seismic Waves are produced by Earthquakes Body WavesSurface Waves Slowest Travels only on Earth’s surface P-Wave Fastest Can travel through Earth S-Wave Fast Can travel through Earth, but not through the core. 5. Which seismic wave can travel only up to the mantle, not the core?

Seismic Waves are produced by Earthquakes Body WavesSurface Waves Slowest Travels only on Earth’s surface P-Wave Fastest Can travel through Earth S-Wave Fast Can travel through Earth, but not through the core. 6. Which seismic wave only travel on the earth surface?

Seismic Waves are produced by Earthquakes Body WavesSurface Waves P-Wave S-Wave 7. What are the two types of surface waves? Rayleigh waves Love waves

Refraction is the bending of light. Pencil looks nearer to the surface. Pencil looks distorted.

8. Which seismic wave stay on Earth’s Surface? Surface waves are seismic waves that stays on the surface.

S waves cannot penetrate the liquid outercore. 9. Which seismic wave refracts and cannot penetrate the outer core? P-wave

10. Which seismic wave can penetrate the core but refracts? P waves also refracts but is able to penetrate the core. P-wave

11. In what directions do the P, S, and Surface waves move? sideways Right angle rolling

P waves - compress and expand the ground like a accordion S waves - vibrate from side to side as well as up and down Surface waves - make the ground roll like ocean waves

12. What Are Seismic Waves? Seismic waves are the waves of energy caused by EARTHQUAKES or the sudden breaking of rock within the earth or an explosion.

There are different types of seismic waves based on the movement. The two major types are body waves ( S and P waves ) and surface waves. Body waves can travel through earth inner layers while surface waves can travel only on the surface of the land. 13. Which is faster S or P wave? 4000 km 7 minutes 4000 km 13 minutes 4000 km

Figure 19-11, page 504 Observations of seismic wave velocities have enabled scientists to subdivide Earth’s interior into various layers. 14. Where do seismic waves travel slowest and fastest? Explain. Solid Crust Partly melted asthenosphere Lower mantle Core S-waves do not penetrate the core Seismic wave travel faster in solids.

Figure 10-10, page 503 Refraction or bending of waves provide scientists information on the composition and interior of Earth. 15. Which type of wave can penetrate the outer and inner core? 16. What happens to S and P waves as they travel inside earth? 15. Which type of wave can penetrate the outer and inner core? 16. What happens to S and P waves as they travel inside earth? Refraction

is the bending of light. Pencil looks nearer to the surface. Pencil looks distorted.

Refraction is the bending of light.

17. How are we affected by Earthquakes?

Liquefaction tsunami Destruction of properties landslide avalanche

17. How are we affected by Earthquakes? Liquefaction Soil turns to mud. landed-in-earthquake1.htm

17. How are we affected by Earthquakes? tsunami

17. How are we affected by Earthquakes? Destruction of properties

17. How are we affected by Earthquakes? landslide

17. How are we affected by Earthquakes? avalanche

17. How are we affected by Earthquakes? Liquefaction tsunami Destruction of properties landslide avalanche

18. What are earthquake waves?

Earthquakes waves are known as seismic waves.

19. How fast are seismic waves?

Seismic waves travel at a speed of 8 kilometers/second or 5 miles/second.

20. How are the layers of Earth different from one another?

Crust is the thinnest layer and mostly made of rocks, the mantle is the thickest layer, the outer core is liquid iron while the inner core is a spinning solid iron.