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1. 3 RD QUARTER DEMONSTRATION MARFE JAN A. MONTELIBANO GRADE 9-CANARY ADVISER

2. TYPES OF VOLCANOES

3. REVIEW

4. PICTURE TALK Identify the pictures below and answer the following questions. Guide Questions: a. Have you been to these places before? b. In what particular places in the Philippines can we find these places? c. What are common/similar in the pictures presented?

5. VOLCANOES 1. _O_C_N_ _S

6. DUST 2._U_ _

7. VOLCANIC ASH 3. _O_ _ A_ I_ A_ _

8. LAVA 4. _ _ V _

9. PHIVOLCS 5. P_I_O_C_

10. Cinder cones VOLCANOES COMPOSITE VOLCANOES SHIELD VOLCANOES LAVA DOME VOLCANOES

11. Most people have never seen a real volcano but have learned about them through movies or books. So when most people think of a volcano, they usually conjure up the Hollywood version: a huge, menacing conical mountain that explodes and spews out masses of lava which falls on rampaging dinosaurs, screaming cave people, or fleeing mobs of betogaed Romans - depending on their favorite volcano disaster movie. While those types of volcanoes do indeed exist, they represent only one "species" in a veritable zoo of volcano shapes and sizes. introduction

12. Cinder cones VOLCANOES Cinder cones are simple volcanoes which have a bowl-shaped crater at the summit and steep sides. They only grow to about a thousand feet, the size of a hill. They usually are created of eruptions from a single opening, unlike a strato-volcano or shield volcano which can erupt from many different openings. Cinder cones are typically are made of piles of lava, not ash.

13. A cinder cone or scoria cone is a steep conical hill of tephra (volcanic debris) that accumulates around and downwind from a volcanic vent . They consist of loose pyroclastic debris formed by explosive eruptions or lava fountains from a single, typically cylindrical, vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as either cinders, clinkers, or scoria around the vent to form a cone that often is beautifully symmetrical; with slopes between 30-40°; and a nearly circular ground plan. Cinder cones VOLCANOES

14. Cinder cones VOLCANOES Most cinder cones have a bowl-shaped crater at the summit. During the eruption, blobs ("cinders") of lava are blown into the air and break into small fragments that fall around the opening of the volcano. The pile forms an oval-shaped small volcano. Famous cinder cones include Paricutin in Mexico and the one in the middle of Crater Lake in Oregon.

15. Cinder cones VOLCANOES

16. COMPOSITE VOLCANOES The most majestic of the volcanoes are composite volcanoes, also known as strato-volcanoes. Composite volcanoes are tall, symetrically shaped, with steep sides, sometimes rising 10,000 feet high. They are built of alternating layers of lava flows, volcanic ash, and cinders. Famous composite volcanoes include Mount Fuji in Japan, Mount Shasta and Mount Lassen in California, Mount St. Helens and Mount Rainier in Washington State, Mount Hood in Oregon, and Mount Etna in Italy.

17. COMPOSITE VOLCANOES

18. Shield volcanoes can grow to be very big. In fact, the oldest continental regions of Earth may be the remains of ancient shield volcanoes. Shield volcanoes are tall and broad with flat, rounded shapes. They have low slopes and almost always have large craters at their summits. The Hawaiian volcanoes exemplify the common type of shield volcano. They are built by countless outpourings of lava that advance great distances from a central summit vent or group of vents. SHIELD VOLCANOES

19. SHIELD VOLCANOES The outpourings of lava are typically not accompanied by pyroclastic material, which make the shield volcanoes relatively safe during eruptions. Mauna Loa, a shield volcano on the "big" island of Hawaii, is the largest single mountain in the world, rising over 30,000 feet above the ocean floor and reaching almost 100 miles across at its base. Other famous shield volcanoes include Kilauea, also in Hawaii, and Olympus Mons of Mars.

20. SHIELD VOLCANOES

21. Volcanic or lava domes are formed by relatively small, bulbous masses of lava too viscous to flow any great distance; consequently, on extrusion, the lava piles over and around its vent. A dome grows largely by expansion from within. As it grows its outer surface cools and hardens, then shatters, spilling loose fragments down its sides. Some domes form craggy knobs or spines over the volcanic vent, whereas others form short, steep-sided lava flows known as “coulees.” Volcanic domes commonly occur within the craters or on the flanks of large composite volcanoes. Lava domes VOLCANOES

22. Lava domes VOLCANOES

23. questions: We will have a quiz, get ¼ sheet of paper. Multiple Choice Occur when material significantly warmer than its surroundings is erupted onto the surface of a planet or moon from its interior. a. Magma c. Ash b. Lava d. Volcano 2. It is usually a cone shaped mountain or hill that opens downward to a pool of molten rock below the surface of the earth. a. Valley c. Hill b. Volcano d. Ridge

24. 3.It is also called stratovolcano a. Composite Volcano b. Shield volcano c. Lava Dome Volcano d. Cinder cone Volcano 4. It is the largest volcano that erupts fluid a. Shield c. Cinder Cone b. Composite d. Lava Dome Simplest type of volcano a. Composite c. Cinder Cone b. Shield d. Stratovolcano

25. SUBMITTED BY : FERRERA, RUTH C. : DORIMAN, CHERRELYN A. SUBMITTED TO : MRS. NORA PEDROSO