Presentation on theme: "All About Volcanoes. What is a Volcano? A volcano is mountain that that leads to a pool of molten lava below the surface of the earth. A volcano consists."— Presentation transcript:
What is a Volcano? A volcano is mountain that that leads to a pool of molten lava below the surface of the earth. A volcano consists of a magma chamber, main vent, and a crater.
Different types of volcanoes. There are four main types of volcanoes. Cinder Cone Volcanoes Composite Volcanoes Shield Volcanoes Lava Dome Volcanoes
Where are volcanoes located? Most Volcanoes are located where two of earths plates collide. Most volcanoes are located in the Pacific Ring of Fire. Over 75% of the world’s active volcanoes are here. Nearly 450 volcanoes in a
What causes a volcano to erupt? The earth’s core is extremely hot and it heats the magma. When the magma gets really hot it begins to bubble. This bubbling creates carbon dioxide gas that expands. The expanding carbon dioxide gas creates pressure and pushes the magma up the vent of the volcano, causing an eruption.
Famous volcanoes Mount St. Helens, Washington. Still active volcano that is famous for its eruption on May 18, 1980. Most deadliest and destructive volcano in US history. 57 people died 250 homes destroyed 185 miles of highway destroyed Krakatoa, Indonesia. Erupted on May 27,1883. Explosion was the loudest sound recorded in history. Eruption generated a tsunami. 36,417 people died 164 villages destroyed Thousands injured 2/3rds of the island was destroyed
Impacts, effects, and damages caused by volcanoes Results in hazards such as: Pyroclastic flows- quickly moving gas, ash, and volcanic rocks that can kill people if they are caught in them. Volcanic ashes- are like small sharp glass particles that can cut off the oxygen supply. Lahars- mudflows from mixing ash and water that can carry large boulders and logs. It can topple and cover buildings and can result in crushing or drowning fatalities. Lava flows- quickly moving and very destructive since they burn and bury everything they come in contact with. Volcanoes can cause: Landslides Floods Tsunamis Loss of life Destroys homes, communities, businesses, and the landscape Economic decline Destroys highways Destroys bridges
Safety measures when volcanoes erupt Follow evacuation orders and warnings. Learn about community warning systems and evacuation plans. Avoid low lying areas. Seek shelter inside. Close windows. Prepare disaster kit that includes: Breathing mask Goggles Evacuation supplies Wear long sleeve shirts and pants. Keep mouth and eyes covered. Turn off car or truck engines if caught outside. Listen to radio for latest emergency updates.