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Understanding Earthquakes and Volcanoes: Hot Spots, Eruptions, and Their Global Impact

This informative guide explores the fascinating phenomena of earthquakes and volcanoes. It delves into the concept of hot spots, where magma surfaces far from tectonic plate boundaries, exemplified by the Hawaiian Islands. Learn about the dangers of pyroclastic flow, types of volcanic eruptions, and their climatic effects, including ash clouds that obscure sunlight. The guide also clarifies the structure of earthquakes, defining key terms such as focus and epicenter. Understanding viscosity aids in comprehending volcanic activity and lava flow.

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Understanding Earthquakes and Volcanoes: Hot Spots, Eruptions, and Their Global Impact

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  1. Earthquakes and Volcanoes By: Nikita Jindal, Ian McClish, and Alisa Kepner 24-31

  2. What is a hot spot? #24

  3. Hot spots When hot molten magma from deep within the earth rises up through the crust or a plate, a hot spot is created. This happens near an active volcanic area close to the Earth’s surface but far from a tectonic plate boundary. The Hawaiian Islands are an example.

  4. What is pyroclastic flow? #25

  5. Pyroclastic Flow Pyroclastic flow is a mixture that moves quickly. It is filled with ash, hot gas, rock, and volcanic debris. Pyroclastic flow is very hazardous, for it can kill a person in seconds. It can be up to 1,300 degrees F, which is 700 degrees C. They consist of two parts: a flow that moves on the ground and a poisonous cloud. They will destroy everything in its path

  6. Explain the 2 types of eruptions #26

  7. 2 Types of Eruptions • Explosive-lots of debris, landslide, pyroclastic flow, lots of ash, lahars, stratovolcanoes, blows top of mountain off • Non-explosive-flows slowly, lava tubes, shield volcanoes, fire fountains, domes, some have pyroclastic flow

  8. How do Volcanoes Affect the Climate? #27

  9. Volcanoes affecting climate There is a lot of rain, thunder, and lightning because of all the ash in the air, this attracts water droplets. Also, ash is shot up into the atmosphere blocking all of the sunlight, causing global temperature to drop.

  10. #28

  11. Whatcausesexplosiveeruptions? #29

  12. Explosive Eruptions Explosive eruptions are caused by magma that plugs the volcano pipe. The pressure builds, and it explodes. The higher the gas content the bigger the explosion.

  13. What Is An Earthquake #30

  14. Earthquakes An earthquake is a tremor in the earth that occurs at faults on plate boundaries. It has two parts, the focus and the epicenter. The focus is where the earthquake actually happens, but under the earth’s surface. The epicenter is where the earthquake is felt by people and buildings, it is directly above the focus.

  15. What Is Viscosity#31

  16. Viscosity Viscosity is the resistance a liquid has to flowing. Low viscosity is when a fluid runs quickly like water. High viscosity is when a fluid flows slowly like honey.

  17. The End

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