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Volcano: Webquest By: Brea Schorn and Sydney Pederson What are the 3 types of volcanoes? Shield Volcanoes Composite Volcanoes Cinder Cone Volcanoes How are the 3 types of volcanoes classified? It refers to the life cycle (active, distinct, or dormant) It is classified by the type it is. It is also classified by how it erupts (loudexplosive or quiet.) How are volcanoes different from each other? It depends on how much volcanic activity it produces. It also matters on what type it is. Why are the volcanoes shaped the way they are? The lava will crack the surface of the volcano and the explosions can change the shape. What are the parts of the volcano? The side of the volcano is the flank. The mouth of the volcano is referred to as a crater. The entrance is called a throat. Why do volcanoes occur? Volcanoes occur when Earth’s plates pull apart causing magma to rise to the surface. Volcanoes can also occur over hot spots and where one plate dives beneath another, forcing magma to rise to the surface. What are Plate Tectonics? Plate tectonics are plates that break apart and push together deep within the earths surface. How do plate tectonics work? They slide very slowly apart and together. At convergent and divergent boundaries. Where do most of the worlds volcanoes occur? In the Ring of Fire. It has 452 volcanoes and is “home” to the worlds most dormant and active volcanoes. How did the Ring of Fire get its name? It got its name because of its shape. It looks like a horseshoe shaped “ring”. What are hot spots? A hot spot is a place where there are active volcanoes. EXAMPLES: Hawaii, Iceland, and Yellowstone. What are some volcanic hazards? Volcanic Gases are one of the most harmful to people, animals, and agriculture. Gases like sulfur dioxide gas can lead to acid rain, and air pollution. It also harms our o-zone layer. What are some tips on preparing? Take volcanic emergency planning workshops If caught indoors close all windows, doors, and vents. Be sure machinery are in sheds. Also, be sure animals are indoors (such as barns). What will you find in an Emergency Kit? Flashlight and extra batteries First Aid Kit and Manual Emergency food and water Essential Medicines Sturdy Shoes Respiratory Protection (mask) Eye Protection (goggles) Battery Powered Radio About Mount St. Helens Mount St. Helens is one of the most active volcanoes in the Cascade Range. Its most recent series of volcanoes began in 1980. It erupted when a large landslide and powerful explosive created a large crater. The U.S. Geological Survey and other U.S. scientists continue to closely monitor this destructive volcano. About Mauna Loa Mauna Loa is located in the Hawaiian Islands. Its elevation is 13,679 feet (400,169 m) Mauna Loa is dangerous for its volcanic activity. Its type is Shield volcano. Its name means long mountain. Mauna Loa’s oldest dated rocks are 100,000-200,000 years old. This is a video of a VOLCANO! Bibliography http://www.bt.cdc.gov/disasters/volcanoes/before.asp The Science Book http://library.thinkquest.org/10136/volcano/volctq.htm http://wiki.answers.com/Q/How_did_the_Pacific_Ring_of_Fire_get_ its_name Science Book- Page 194 Google http://search.usgs.gov/results.html?cx=005083607223377578371 %3Ab5ixbbpqpx0&cof=FORID%3A11&q=wheredo+many+of+the+ worlds+volcanoes+occur%3F