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Volcanoes form as molten rock erupts.

A shield volcano is made up of many layers of low-silica lava. A composite volcano consists of layers of erupted rock fragments and cooled flows of high-silica lava. ...

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Volcanoes form as molten rock erupts.

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    Mountains and Volcanoes CHAPTER Mountains and volcanoes form as tectonic plates move. Movement of rock builds mountains. Volcanoes form as molten rock erupts. Volcanoes affect Earth’s land, air, and water. NEW CHAPTER 3.1 3.2 3.3 SECTION OUTLINE fault-block mountain folded mountain Movement of rock builds mountains. Folded mountains form as plates push together. 3.1 CHAPTER RESOURCES Fault-block mountains form as the lithosphere is stretched. SECTION OUTLINE fault-block mountain folded mountain Movement of rock builds mountains. Folded mountains form as plates push together. 3.1 CHAPTER RESOURCES A mountain that forms as continental crust is compressed and rocks bend into large folds.

    Slide 4:folded mountain

    KEY CONCEPT SUMMARY Movement of rock builds mountains. fault-block mountain folded mountain 3.1 CHAPTER RESOURCES

    A mountain that forms as blocks of rock move up or down along normal faults in areas where the lithosphere is being pulled apart.

    Slide 5:fault-block mountain

    KEY CONCEPT SUMMARY Movement of rock builds mountains. fault-block mountain folded mountain 3.1 CHAPTER RESOURCES

    Slide 6:Volcanoes form as molten rock erupts.

    SECTION OUTLINE lava pyroclastic flow volcano Volcanoes erupt molten rock, rock fragments, and gases. Different types of erupted materials build up different types of volcanoes. 3.2 CHAPTER RESOURCES

    Slide 7:Volcanoes form as molten rock erupts.

    SECTION OUTLINE lava pyroclastic flow volcano Volcanoes erupt molten rock, rock fragments, and gases. Different types of erupted materials build up different types of volcanoes. 3.2 CHAPTER RESOURCES

    An opening in the crust through which molten rock, rock fragments, and hot gases erupt; a mountain built up from erupted materials.

    Slide 8:volcano

    KEY CONCEPT SUMMARY Volcanoes form as molten rock erupts. lava pyroclastic flow volcano 3.2 CHAPTER RESOURCES

    Molten rock that reaches a planet’s surface through a volcano.

    Slide 9:lava

    KEY CONCEPT SUMMARY Volcanoes form as molten rock erupts. lava pyroclastic flow volcano 3.2 CHAPTER RESOURCES

    A dense cloud of superheated gases and rock fragments that moves quickly downhill from an erupting volcano.

    Slide 10:pyroclastic flow

    KEY CONCEPT SUMMARY Volcanoes form as molten rock erupts. lava pyroclastic flow volcano 3.2 CHAPTER RESOURCES

    SECTION OUTLINE

    Slide 11:Volcanoes affect Earth’s land, air, and water.

    geyser acid rain Materials erupted from volcanoes, as well as heat from molten rock underground, affect Earth’s surface. 3.3 CHAPTER RESOURCES

    Rain that has become more acidic than normal due to pollution.

    Slide 12:acid rain

    KEY CONCEPT SUMMARY Volcanoes affect Earth’s land, air, and water. geyser acid rain 3.3 CHAPTER RESOURCES

    A type of hot spring that shoots water into the air.

    Slide 13:geyser

    KEY CONCEPT SUMMARY Volcanoes affect Earth’s land, air, and water. geyser acid rain 3.3 CHAPTER RESOURCES

    I. Movement of rock builds mountains. A. Most mountains form along plate boundaries. 1. Mountain Ranges and Belts KEY CONCEPT SUMMARY 2. Mountains, Rocks, and Sediment Movement of rock builds mountains. B. Mountains can form as rocks fold. C. Mountains can form as rocks move along faults. fault-block mountain folded mountain 3.1 CHAPTER RESOURCES 1. Magma II. Volcanoes form as molten rock erupts. A. Volcanoes erupt many types of material. B. Most volcanoes form along plate boundaries. KEY CONCEPT SUMMARY 2. Rock Fragments 3. Volcanic Gases

    Slide 15:Volcanoes form as molten rock erupts.

    C. Volcanoes can be many shapes and sizes. D. Scientists monitor volcanoes. lava pyroclastic flow volcano 3.2 CHAPTER RESOURCES

    III. Volcanoes affect Earth’s land, air, and water. A. Volcanic eruptions affect the land. 2. Deep-Sea Vents 2. Long-term Effects B. Volcanic gases and ash affect the air. KEY CONCEPT SUMMARY

    Slide 16:Volcanoes affect Earth’s land, air, and water.

    C. Volcanic activity affects water. 1. Hot Springs, Geysers, and Fumaroles 1. Immediate Effects geyser acid rain 3.3 CHAPTER RESOURCES

    CHAPTER HOME

    Slide 17:Image Gallery

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    CHAPTER HOME

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    BACK TO CHAPTER Click on the items below to access resources on Standardized Test Practice Practice state standardized tests Math Tutorial Review math concepts Resource Centers Get more information on select science topics Content Review Review key concepts and vocabulary Audio Readings Hear chapter audio readings

    Slide 22:Chapter Resources

    CHAPTER HOME Animations Link to all the McDougal Littell Science animations Review Game Play a fun interactive review game Image Gallery Click here to review chapter images and animations

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