Volcanoes(Types of volcanoes according to their activity) .pptx

Volcanoes

1. Volcanoes According to Activity

2. Active Volcanoes -- exhibit volcanic activity such as rumbling, crater glow, eruption, and earthquakes within the last 10,000 years --there are 1,350 potentially active volcanoes Example: Taal Volcano Mayon Volcano Mount Canlaon Mount Pinatubo

3. Inactive Volcanoes -- show no historical record of eruption in the past 10,000 years --have the potential to erupt Example: Mount Fuji Mauna Kea Mount Ararat

4. Extinct Volcano -- have no record of eruption -- they do not have a magma supply Example: Mount Buninyong in Australia Kyushu-Palau Ridge in Philippine Sea

5. Other Associated Volcano Landforms Caldera Complex - A depression formed at the summit of shield volcanoes Lava Dome - mounds of lava formed after a volcanic eruption. Has high levels of silica and low amounts of dissolved gases. Submarine Volcano - Volcanoes on the ocean floor and formed through collision of oceanic plates. Glacial Volcanoes Volcanoes that are overlain by glaciers. Ex. Alaska Volcano

6. Volcanic Eruptions

7. Hawaiian Eruption -the least violent type, with a highly fluid or runny lava flowing out several vents. Strombolian Eruption -violent, featuring continuous ejection of magma and gas that results in the formation of volcanic bombs, and cinder cones.

8. Vulcanian Eruption -a thick viscous magma flows around the vent as solid lava and dust ejected Plinian Eruption - The most violent and explosive type of eruption. It is accompanied by pyroclastic debris and lahars.

9. Quiz ¼ sheet of paper Write the letter of the correct answer. 1. Show no historical record of eruption in the past 10,000 years. A. Active Volcano C. Extinct volcano B. Inactive Volcano D. Hawaiian Eruption 2. Volcano with no magma supply. A. Active Volcano C. Extinct volcano B. Inactive Volcano D. Hawaiian Eruption 3. Type of volcano that exhibit volcanic activity within the last 10,000 years. A. Active Volcano C. Extinct volcano B. Inactive Volcano D. Hawaiian Eruption 4. How many active volcanoes are there worldwide? A. 1350 C. 1730 B. 1530 D. 1370 5. Volcanoes on the ocean floor. A. Submarine volcano C. Lava dome B. Glacial volcano D. Caldera complex 6. Volcanoes that are overlain by glaciers. A. Submarine volcano C. Lava dome B. Glacial volcano D. Caldera complex 7. Mounds of lava formed after volcanic eruption. A. Submarine volcano C. Lava dome B. Glacial volcano D. Caldera complex 8. The most violent and explosive type of eruption. A. Hawaiian eruption C. Vulcanian eruption B. Strombolian eruption D. Plinian eruption 9. The least violent type with a highly fluid or runny lava. A. Hawaiian eruption C. Vulcanian eruption B. Strombolian eruption D. Plinian eruption 10. A thick viscous magma flows around vent as solid lava and dust. A. Hawaiian eruption C. Vulcanian eruption B. Strombolian eruption D. Plinian eruption