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❶What is the difference between lava and Magma? Gas, ash and magma can come out of volcanoes.

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By creating an account, you agree to Study. Explore over 4, video courses. Find a degree that fits your goals. Try it risk-free for 30 days. This homework help resource uses simple and fun videos that are about five minutes long. Physical Science - Volcanoes: Test your knowledge with a question chapter practice test. View all practice tests in this course. What is a Volcano? The Flow of Pyroclastic Materials A pyroclastic flow is the flow of volcanic ash, gases and fragments following a volcanic eruption.

Preventing Volcanic Hazards Volcanic hazards are any type of volcanic process that leads to destruction or threatens life. Test your knowledge of this chapter with a 30 question practice chapter exam. Other Practice Exams in this course. Test your knowledge of the entire course with a 50 question practice final exam.

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To learn more, visit our Earning Credit Page Transferring credit to the school of your choice Not sure what college you want to attend yet? Browse Articles By Category Browse an area of study or degree level. How to Find Them. Homework Help Physical Science - Stoichiometry: Homework Help Physical Science - Electricity: Homework Help Physical Science - Magnetism: Homework Help Sedimentary Rocks: Homework Help Metamorphic Rocks: Homework Help Physical Science - Earthquakes: Browse Browse by subject.

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Email is not a valid email. Email already in use. Cancel before and your credit card will not be charged. Your Cart is Empty. Please Choose a Product. Password must be at least 8 characters long. Password may only be 56 characters long. All the gas builds up pressure, which causes the magma to explode out of the volcano. When magma is thick, the gas bubbles get trapped and the pressure builds up so much that the explosion shoots high up into the air.

If magma cools down as it rushes up the vent, it will come out as rock or ash. Volcanoes can be very dangerous. Earthquakes can happen when a volcano erupts, causing very large waves called tsunamis. If gasses and ash get into the atmosphere, it can even change the weather by causing thunderstorms and cool temperatures. Volcanologists scientists who study volcanoes can sometimes tell if a volcano is going to erupt by keeping track of earthquakes underneath it. The types of gasses coming out of the vent can also change close to an eruption.

Animals living near a volcano may start to act differently, as if they can sense something is going to happen. These plates can slide against each other, which lets magma from underneath squeeze up through the cracks. When tectonic plates move, it also causes earthquakes. Most volcanoes are located along the edges of tectonic plates, especially around the Pacific Ocean — this is called the Pacific Ring of Fire. The ancient Romans wrote about a huge volcanic eruption that happened in 79 AD in Pompeii.

The ash and rocks that erupted out of Mount Vesuvius buried nearby towns and killed more than 1, people. Mount Vesuvius is dormant today. Access thousands of brilliant resources to help your child be the best they can be. What is a volcano? Volcanoes are big holes that let out hot gasses , ash and magma from deep inside the Earth. Many volcanoes are mountains , made up of layers of lava and ash. Many volcanoes have several vents — a main one, and secondary ones that branch off the main vent.

The Earth has three layers — the crust at the very top, then the mantle , then the core at the very middle of the planet. The largest active volcano in the world is Mauna Loa, on the Hawaiian islands.

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A volcano is a landform (usually a mountain) where molten rock erupts through the surface of the planet. In simple terms a volcano is a mountain that opens downward to a pool of molten rock (magma) below the surface of the earth.

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What is a volcano? A volcano is a very deep hole in the Earth’s top layer that can let out hot gasses, ash and lava. Many volcanoes are also mountains. Volcanoes have long shafts that go all the way down .

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The Volcanoes chapter of this High School Physical Science Homework Help course helps students complete their volcanoes homework and earn better grades. This homework help resource uses simple and fun videos that are about five minutes long. Shield Volcano: A shield volcano is the largest volcano on the earth that erupt fluid lava. It usually erupts the basaltic type of lava that has low viscosity, which means that it can flow very far and quickly. The largest shield volcano on the earth is Mauna Loa that is situated on the big island of Hawaii.

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Volcanoes: Homework Help Chapter Exam Instructions Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to . Sill - A flat piece of rock formed when magma hardens in a crack in a volcano. Vent - An opening in Earth's surface through which volcanic materials escape. Flank - The side of a volcano. Lava - Molten rock that erupts from a volcano that solidifies as it cools. Crater - Mouth of a volcano - .