3. What do you observe in the pictures? What can you infer from the picture?

4. How does an earthquake occur? It occurs when there is a sudden breaking of large rocks below or at the surface of the earth.

6. What are the two types of earthquakes? 1. Tectonic earthquake 2. Volcanic earthquake

7. Tectonic Earthquake

8. Volcanic Earthquake

9. P waves - P or Primary waves are the fastest of the seismic waves. - They travel at incredible speeds, 14,000 mph to 25,000 mph through the core of the Earth. - They are even able to pass all the way through the entire Earth.

11. S Waves - S or surface waves. They travel at about half the speed of P waves. - They move objects in their paths in an up and down motion, in the direction that the wave is moving.

13. L Waves - L or Love waves move the ground from side to side in a horizontal plane but at right angles. - The horizontal shaking of Love waves is particularly damaging to the foundations of structures.

16. How will you relate earthquakes & volcanoes? 1. When a volcano erupts, it can cause 2. They are both caused by crustal plates movement. earthquake.

18. How are volcanoes formed? When a continental plate and an oceanic plate move apart and the space is filled up with molten magma.

20. What agency in the Philippines studies about earthquakes & volcanoes? PHIVOLCS (Philippine Institute of Volcanology & Seismology)

21. Did you know that our country also experienced one of the most terrible earthquakes? It was July 16, 1990, at exactly 4:26 pm, with a 7.8 magnitude. It killed 1,621 people.

24. Partner Activity - Choose a partner. - List down 3 reasons why volcano is a friend to us and 3 reasons why it is a foe to us. (cuartilla)

25. How does an earthquake occur? How are volcanoes formed?

26. Group Activity - Compare and contrast earthquake & volcanic eruption. - Give 2 differences for earthquake & volcanic eruption and their 2 similarities. (for 6 points)

27. Group # Gr. 6 - C Mar. 4, ‘11 earthquakeVolcanic eruption It releases lava.

28.  Quiz on volcanoes, earthquakes, and plate boundaries on March 8 (Tuesday). Memo: