Volcano Test Review                                                        Name_______________________________

Your test on Volcanoes will be on Thursday, 12/21 for A day classes and Friday, 12/22 for B day classes. PLEASE TAKE SOME TIME TO STUDY!!!!!

 

Topics on the test will include, but not be limited to the following topics. You should  look over your notes, viscosity lab, and all of the hand-outs you worked on during this unit.

  1. What IS a volcano?

 

  1. Where are the THREE places where volcanoes are found?

 

 

  1. Why are there volcanoes around the Pacific Ocean, and what name is given to this group of volcanoes?

 

  1. What is an island arc and give an example of one.

 

  1. How is lava different from magma?

 

  1. Explain the differences among active, dormant, and extinct volcanoes.

 

 

 

  1. What is a hot spot? Give two examples.

 

  1. What is viscosity?

 

  1. Name a substance with high viscosity

Name a substance with low viscosity

  1. What TWO factors affect the viscosity of magma?

 

 

  1. A substance made up of only ONE kind of atom is known as WHAT?
  2. What do you call two or more elements that are combined with one another CHEMICALLY?

 

  1. Name two chemical properties
  2. Name two physical properties
  3. Why might DIVERGING plates cause a volcano to form?

 

 

  1. Why might CONVERGING plates cause a volcano to form?

 

 

  1. What is the name of the MOST abundant material in the Earth’s crust?
  2. Name AND DESCRIBE the three types of magma

 

 

 

 

 

 

  1. Would oceanic crust, or continental crust have a higher silica content?
  2. Of the three types of magma, which has the LOWEST viscosity?

Which has the highest viscosity?

 

  1. What is the relationship between silica content of magma and the viscosity of the magma?

 

 

  1. What type of magma is usually associated with a QUIET eruption?
  2. What type of magma is usually associated with an explosive eruption?
  3. Explain the role of viscosity and gases in determining whether a volcanic eruption will be quiet, or explosive.

 

 

 

 

 

  1. What is aa? What kind of magma will form aa lava?

 

 

  1. What is pahoehoe? What kind of magma will form pahoehoe lava?

 

 

  1. What is tephra?

 

  1. Name and describe the three main types of volcanoes

 

 

 

 

 

 

 

 

 

 

 

  1. What kind of volcano tends to have an explosive eruption? What kind of magma is usually involved in this kind of volcano?

 

 

 

 

  1. What is pyroclastic flow?

 

 

  1. What is a caldera and where could I find one?

 

 

 

  1. Circle the correct word in parenthesis: When lava hardens, (igneous, sedimentary, metamorphic) rock is formed.
  2. Circle the correct word in each parenthesis: Basaltic magma is found when (continental/oceanic) crust melts. Basaltic magma is (high/low) in silica and tends to have (high/low) viscosity. The type of volcano that usually contains basaltic magma is known as a (cinder cone/shield) volcano. These volcanoes tend to have (quiet/explosive) eruptions.
  3. Circle the correct word in each parenthesis: Rhyolite/Granitic magma is found when (continental/oceanic) crust melts. Rhyolitic/granitic magma is (high/low) in silica and tend to have (low/high) viscosity. The type of volcano that usually contains Rhyolitic/granitic magma is known as (cinder cone/shield) volcano. These volcanoes tend to have (quiet/explosive) eruptions.
  4. What is a volcanic neck?

 

  1. Where do batholiths initially form?

 

  1. What is the difference between a dike and a sill?

 

 

  1. Light colored lava comes from what type of magma?

Dark colored lava comes from what type of magma?

  1. In a composite volcano, what are the layers that make up the sides of the volcano? What types of eruptions cause these layers?
  2. Look at the volcano picture in your notes and make sure you can label important parts!!

 

  1. What ancient Italian city was buried by volcanic ash in 79AD?

 

  1. What two elements make up silica?

 

  1. STUDY!!!!!