2 Volcanoes The three stages in the life of a volcano are: Make sure you can describe each stage of a volcano’s life cycleThe three main types of volcanoes are:Make sure that you know the differences between these types of volcanoes and can describe them.Active, dormant, and extinctShield, composite, and cinder cone
3 VolcanoesVolcanoes can have two main types of eruptions. They are __________ and ____________.What causes an eruption to be either quiet of explosive?Another name for an explosive eruption is aQuiet and explosiveThe amount of silica in the magma – high is silica make explosive eruptions and low in silica makes quiet eruptionsPyroclastic flow
4 VolcanoesThe major volcanic belt that surrounds the Pacific Ocean is called the ____________What is the difference between magma and lava?A weak spot in the crust where molten material called magma reaches the surface is called a _______Ring of FireMagma is inside the Earth, lava is on the surface.Volcano
6 VolcanoesDue to subduction, a chain of volcanic mountains may rise to the surface of the ocean resulting in a string of islands called an _______________Some islands form the way that the Hawaiian islands formed over a crack far from a plate boundary. These areas are called ______________.Island arcExamples are Japan, New Zealand, The Philippines, the Aleutians and othersHot Spots
7 Volcanoes Name the parts of a volcano Magma chamber, pipe, vent, side vent, crater, lava flow, ash cloudMake sure that you know where they would fit on this diagram.
8 VolcanoesWhat is the name for the fountain of water and steam that erupts from the ground due to heating within the Earth?What is the word for an old person, especially an eccentric old man.A geyserA geezer
9 VolcanoesA huge hole left in the ground by the collapse of a volcanic mountain is called a ___________.When magma hardens in a volcano’s pipe and eventually becomes exposed due to erosion, this landform is left behind.CalderaA volcanic neck
10 VolcanoesMagma that forces itself between or across rock layers can form these landforms.A huge mass of rock formed by hardened, cooled magma can help form a mountain range like a large portion the Sierra Nevadas. It is called a __________.Dikes and SillsBatholith
11 VolcanoesThank you for watching this PowerPoint. Good luck on the test.