About This Chapter
Volcanoes - Chapter Summary and Learning Objectives
Of all of the Earth's natural features, few are able to cause such sudden and dramatic changes as the volcano. Volcanoes can not only quickly change the landscape, they can also have devastating consequences for human life. In this chapter, video instructors introduce you to the nature and types of volcanic landforms. You'll learn the important vocabulary associated with this branch of earth sciences. By the end of this chapter, you should be able to:
- Define 'volcano' and explain why volcanic eruptions occur
- Name the three major types of volcanoes and identify their characteristics
- Explain how the different types of volcanic landforms are formed
- Explain what can be done to minimize the damage caused by volcanic eruptions
|What is a Volcano? - Definition & Eruptions||Describe the nature of a volcano and volcanic eruptions|
|Types of Volcanoes: Shield, Cinder Cones, & Composite Cones||Compare and contrast the three major types of volcanoes - shield volcanoes, cinder cones, and composite cones - considering size, composition, shape, and eruptive style|
|Volcanic Eruption Gases & Their Effects||Identify the main gases released during an eruption, including water vapor, carbon dioxide, nitrogen, and sulfur dioxide, and describe the role these gases play in eruption|
|The Flow of Pyroclastic Materials||Describe the nature of pyroclasitc flow based on size, including ash, dust, welded tuff, and lapilli, as well as texture and composition such as scoria and pumice|
|Volcanic Landforms: Types & Formation||Identify various types of volcanic landforms, including fissure eruptions and lava plateaus, calderas and craters, and volcanic pipes (conduits) and necks. Discuss how these are formed|
|Volcanic Hazards: Definition, Types & Prevention||Define a volcanic hazard. Discuss the various types of volcanic hazards, such as volcanic earthquakes, directed blast, tephra, volcanic gases, lava flows, debris avalanches, landslides, tsunamis, pyroclastic surge, pyroclastic flows, and lahars. Describe some basic prevention methods|
1. What is a Volcano? - Definition & Eruptions
Volcanoes are vents that allow lava, rock fragments and gases to escape from layers beneath the earth's surface. Learn how volcanoes form both on land and underwater and why they erupt.
2. Types of Volcanoes: Shield, Cinder Cones & Composite Cones
The earth ejects lava, rock fragments, hot vapor and gases during volcanic eruptions. Volcanoes vary based on size, shape, composition and eruptive style. Learn about the different types of volcanoes, such as shield, cinder cone and composite cone.
3. Volcanic Eruption: Gases Released & Their Effects
Volcanic eruptions emit water vapor and toxic gases into the atmosphere. Learn about the gases emitted from an erupting volcano, such as carbon dioxide, sulfur dioxide, hydrogen sulfide, hydrochloric acid and carbon monoxide and their effects in this video lesson.
4. Lava Flow: Definition & Types
This lesson defines lava and explores the different chemical distinctions of lava. By the end of this lesson, you should be able to name the different types of lava and some of its distinctive morphologies.
5. The Flow of Pyroclastic Materials
A pyroclastic flow is the flow of volcanic ash, gases and fragments following a volcanic eruption. Learn about the types of pyroclastic flows and the materials that make them up and contribute to their fluid nature.
6. Volcanic Landforms: Types & Formation
Volcanic eruptions pull materials up from deep within the earth to form various volcanic landforms, such as lava domes, lava plateaus, fissure eruptions, craters and calderas. Learn about these volcanic landforms and how they are created.
7. Lava Flow, Pyroclastic Flow, Pyroclastic Surge & Tephra: Preventing Volcanic Hazards
Volcanic hazards are any type of volcanic process that leads to destruction or threatens life. Learn about specific volcanic hazards including lava flows, pyroclastic flows, pyroclastic surges and tephra and measures used to prevent or reduce damage
8. Volcanic Hazards & Prevention: Landslides, Lahars & Tsunamis
Volcanic hazards are any volcanic process that can damage property or threaten life. Learn about volcanic hazards, such as landslides that can trigger lahars and tsunamis, and ways to prevent these hazards from threatening people's lives.
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Other chapters within the UExcel Earth Science: Study Guide & Test Prep course
- Basic Earth Science Concepts
- Understanding Earth's History
- Understanding Geologic Time
- The Properties of Matter
- Overview of Earth's Spheres & Internal Structure
- The Lithosphere
- Overview of Minerals & Rocks
- Igneous Rocks Basics
- Weathering, Erosion & Wasting
- Sedimentary & Metamorphic Rocks
- Geological Forms
- Water Balance
- Understanding Running Water
- Overview of Groundwater Systems
- Life Cycle of Glaciers
- Properties of Oceans
- Basics of Coastal Hazards
- The Atmosphere
- Weather and Storms
- Understanding Earthquakes
- Understanding Energy Resources
- UExcel Earth Science Flashcards