PPT-Types of Volcanoes

Frequency and Quantity There are 550 historically active volcanoes About 60 erupt annually The majority are 1 at the edge of continents and 2 underwater Dormant volcanic cone in Japan What causes volcanoes. Mountains. A . mountain. is an area of land that rises steeply from the land around it. . Most mountains belong to . ranges. , and ranges that are close together make up . belts. . . Most mountain belts are located along plate boundaries. . GO. What do you know already about volcanoes?. Let’s learn more. Click on the links below.. What is a volcano?. What is magma and what is lava?. What types of volcano are there?. What causes a volcano to erupt?. . . Here we will compare extrusive and intrusive volcanic features and action. q distinguish magma from lava. q identify intrusive and extrusive igneous features (e.g., sill, dike, . batholith. rd. graders. By Amy Zimmerman. what I hope my students learn…. What a volcano is.. Understand that there are 3 main types of volcanoes.. Understand the process of eruption. . Know all the different parts of a volcano.. Learning Objective. : To be able to identify and describe the two different types of eruption. Effusive Eruptions…. Key Ideas:. Occur when hot, runny magma reaches surface. Gasses can escape more easily so less pressure builds up. Warm Up. Why do you think magma rises? Consider an ice cube floating at the top of a glass of water. Objective:. SWBAT. Describe at least two of the three types of volcanoes and how they form. Agenda:. Describe how the locations of volcanoes are related to plate tectonics.. Suggest why volcanoes are found at convergent and divergent plate boundaries.. Describe how . intraplate. volcanoes form.. Volcanic activity takes place primarily at . rin. uphill and down dale,. Knapping the chucky stones to pieces . wi. ’ hammers,. Like . sae. . mony. . roadmakers. run daft –. They say it is to see how the . warld. was made.. - Sir Walter Raleigh. Compare the features of volcanoes.. Describe the stages in volcano formation.. What are Volcanoes?. Volcanoes are vents through which molten rock and gas escape from a . magma chamber.. Volcanoes can differ. Glaciers. Earthquakes. Rivers. GEOL 131:Running Water. GEOL 131:Running Water. GEOL 131:Running Water. Precipitation and snowmelt can:. Infiltrate . absorbed into ground. becomes part of groundwater. Volcanoes. Volcano:. mountain that forms in Earth’s crust when molten material (magma) reaches the surface. . Remember, . magma . is molten rock below ground; . lava. is molten rock at the surface. . . . Cause. most volcanoes are formed when two of Earth’s plate collide. the collision drives one of the plates under another . the plate that is under the other one begins to melt-->this melted rock is known as magma. Magma is a mixture of molten rock, volatiles and solids that is found beneath the surface of the Earth.. In some instances, it solidifies within the crust to form . plutonic rocks. . In others, it erupts onto the Earth’s surface to form . View Forces of Nature on National Geographic!. CATASTROPHE . Extreme Forces of Nature. Natural Disasters Effects on Environment. Physical structures. Crops and food supplies. Vegetation and animal species.