1st Quarter Observation- Seismic Waves.pptx

The Presentation is all about the Seismic waves and its types.

Objectives:
1. Define seismic waves scientifically.
2. Differentiate the different types of seismic waves.
3. Recognize the importance of seismic waves in the study of the Earth’s interior.

Earthquake is a vibration produced by the rapid release of energy on the ground. This energy is in the form of seismic waves that radiates in all direction and recorded by the seismographs. There are two main types of seismic waves: surface waves and body waves. Surface wave can travel through the surface of the Earth but not inside the Earth like mantle and core. On the other hand, body waves can travel in the inner part of the Earth. Surface waves has two types: Love waves and Rayleigh waves. Love wave moves through the ground in a side-to-side horizontal motion just like the movement of snake. It is faster than the Rayleigh waves and causes more damage than the other. Love wave is named after A.E.H. Love, a British mathematician who worked out the mathematical model for this kind of wave in 1911. Another type of surface waves that rolls along the ground just like a wave rolls across a lake or ocean is the Rayleigh wave which was named after John William Strutt, Lord Rayleigh, who mathematically predicted the existence of this kind of wave in 1885. Most of the shaking felt from an earthquake is due to the Rayleigh wave.
Unlike surface waves, body waves can travel through the Earth’s inner layers. With this characteristic of the body waves, they are used by scientists to study the Earth’s interior. These waves are of a higher frequency than the surface waves. The two types of body waves are the P-waves (primary waves) and the S-waves (secondary waves). The P-wave (primary wave) is a pulse energy that travels quickly through the Earth and through liquids. The P-wave travels faster than the S-wave. After an earthquake, it reaches a detector first (the reason why it is called primary). The P-waves also called compressional waves, travel by particles vibrating parallel to the direction the wave travel. They force the ground to move backward and forward as they are compressed and expanded. Most importantly, they travel through solids, liquids and gases. The S-wave (secondary wave or shear wave) is a pulse energy that travels slower than a P-wave through Earth and solids. The S-waves move as shear or transverse waves, and force the ground to sway from side to side, in rolling motion that shakes the ground back and forth perpendicular to the direction of the waves. The idea that the S-waves cannot travel through any liquid medium led seismologists to conclude that the outer core is liquid.

1. Cleanliness of the room pick up the trashes around you and keep it in your bag.

2. Prayer let us pray and feel the presence of the lord.

3. G reetings G ood afternoon class!

4. Attendance checking are you happy or sad? Each group with complete Attendance will receive one Additional point that can be Added to written activities.

5. What do you know about this?

6. Observe and identify what is the idea or concept behind in each pictures being shown.

7. P and S waves What are the two waves that is b eing detected by a Seismograph .

8. ________ AND _______ PART OF THE EARTH R elate your idea to the t ag line “ You are beautiful inside and outside” EXTERNAL IN TERNAL

9. SEISMOGRAPH The picture is a device.

10. EARTHQUAKE The picture is a phenomenon.

11. WAVE

12. LET US FIGURE IT OUT!

13. Role playing act the assigned skit and answer the given questions

14. CAN I ASK SOME QUESTIONS? What do you call the two people engaged in the race? 2. Who is faster? Why do you say so?

15. GUIDE QUESTIONS? What do you call the two people engaged in the race? 2. Who is faster? Why do you say so?

16. Role playing act the assigned skit and answer the given questions

17. CAN I ASK SOME QUESTIONS? What do you call the two people engaged in the demonstration of force? 2. Which causes more damage? Why do you say so?

18. GUIDE QUESTIONS? What do you call the two people engaged in the fight? 2. Which causes more damage? Why do you say so?

19. SEISMIC WAVES P- WAV E S S - WAVES LOVE - WAVE S RAYLE I GH - WAVES _ _ _ _ M I C WAVES

20. OBJECTIVES A. Recall the two types of seismic waves ; B. Characterize P, S and surface waves; C. Differentiate the different types of seismic waves ; and D. Explain the importance of seismic waves in the study of the Earth’s interior .

21. BODY WAVES- i s a wave that travels inside the inner layers of the Earth. SURFACE WAVES- is a wave that travels only on the surface of the Earth. + Word-Aid +

22. MOHOROVIC DISCONTINUITY- a n area located between lower crust and upper mantle where wave velocity changes. GUTENBERG DISCONTINUITY- an area located between lower mantle and outer core where wave velocity changes. + Word-Aid +

23. LET US EXPLORE!

24. PERFORMANCE TASK THE CLASS WILL BE DIVIDED INTO FOUR GROUPS. Each will answer and then report a task assigned to them. Collaboration and cooperation must be observed.

25. LET US EXPLAIN!

26. PRESENTATION OF OUTPUT E ach group will report their output. They will be graded according on the presented rubrics.

27. RUBRICS

28. LET US SUM IT UP!

29. SEISMIC WAVES BODY WAVES SURFACE WAVES P- WAVE S - WAVE RAYLEIGH WAVE LOVE WAVE FORWARD AND BACKWARD UP AND DOWN SIDE BY SIDE ROLLS

30. LET US EXPLAIN FURTHER!

31. EVERYBODY LET US SING AND DANCE

32. THE SEISMIC WAVE SONG (IN THE TUNE OF TWINKLE TWINKLE LITTLE STAR)   P- WAVE, P- WAVE S, S- WAVE RAYLEIGH, RAYLEIGH LOVE, LOVE WAVE THESE ARE THE FOUR SEISMIC WAVES P, S, RAYLEIGH LOVE WAVE.   NOW YOU KNOW THE FOUR SEISMIC WAVES HOPE YOU SHARE THIS SONG TO THEM.

33. Let us GO BEYOND!

34. MOHOROVICICC DISCONTINUITY ANDRIJA MOHOROVOCICC BENO GUTENBERG GUTENBERG DISCONTINUITY INGE LEHMAN

35. Let us test your learnings!

36. MULTIPLE CHOICE CHOOSE THE LETTER OF THE CORRECT ANSWER AND WRITE IT IN YOUR ISN.

37. Which of the following is NOT a seismic wave? A. LOVE WAVE C. S- WAVE B. RADIO WAVE D. RAYLEIGH WAVE

38. 2. Which picture shows the relative motion of a Rayleigh wave? A. C. B. D.

39. 3. Love wave: side by side : S- wave: _____ A. roll C. up and down B. sway D. swirling

40. 4 . P-wave: : Rayleigh wave: roll A. swirling C. up and down B. sway D. forward and backward

41. 5. Why seismic waves important to scientists or seismologists? To study the composition of crust. To study the external structure of the Earth. To study the internal structure and composition of Earth. To study the minerals and energy of external and internal part of the Earth.

42. ANSWER KEY 1. B 2. B 3. C 4. D 5. C