CHAPTER 5 VOLCANOES AND VOLCANIC HAZARDS READING QUIZ #1 – 12 QUESTIONS.

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Presentation transcript:

CHAPTER 5 VOLCANOES AND VOLCANIC HAZARDS READING QUIZ #1 – 12 QUESTIONS

1. What is the main difference between the eruption style of Mt. St. Helens in Washington, and Kilauea in Hawaii? 5.1

The primary factors that affect the behavior of magma and lava are its ___________ and ___________, and to a lesser extent, the amount of ____________ _______ it contains.

Explain viscosity.

A magma’s viscosity is directly related to the amount of ________ content.

Quiescent (quiet) eruptions generally occur due to _________ magma, where explosive eruptions generally occur due to __________ magma.

Particles of ash, fragmented lava, and gases expelled from a volcano during a violent eruption make a plume called an __________ _________.

Which type of lava flow is made of sharp, jagged chunks of partially solidified lava?

Which type of lava flow is made of free flowing, low viscosity lava?

Another name for pyroclastic materials is _________.

When hot ash falls, the glassy fragments often fuse together making a rock called _________ _______.

Ejecta larger than 2.5” in diameter are called _________ if they are hardened lava, and ________ when they are molten lava.

Name two common vesicular rocks.

1. What is the main difference between the eruption style of Mt. St. Helens in Washington, and Kilauea in Hawaii? 2. The primary factors that affect the behavior of magma and lava are its _______ and _______, and to a lesser extent, the amount of _______ _______ it contains. 3. Explain viscosity. 4. A magma’s viscosity is directly related to the amount of ________ content. 5. Quiescent (quiet) eruptions generally occur due to ______ magma, where explosive eruptions generally occur due to ______ magma. 6. Particles of ash, fragmented lava, and gases expelled from a volcano during a violent eruption make a plume called an __________ _________.

7. Which type of lava flow is made of sharp, jagged chunks of partially solidified lava? 8. Which type of lava flow is made of free flowing, low viscosity lava? 9. Another name for pyroclastic materials is _________. 10. When hot ash falls, the glassy fragments often fuse together making a rock called _________ _______. 11. Ejecta larger than 2.5” in diameter are called _________ if they are hardened lava, and ________ when they are molten lava. 12. Name two common vesicular rocks.