1. What are the names of the three main layers of the earth? pg. 6/7

• Plates, Magma, Mantle
• Core, Mantle, Crust
• Convection currents, Crust, Mantle
• Plates, Mantle, Crust

2. What percentage of the world's volcanoes on land are found in the Ring of Fire? pg. 9

• 50%

• 75%

• 25%

• 33%

3. What are the four different types of volcanoes? pg. 16/17

• Stratovolcanoes, Cinder Cones, Lava Domes, Shield Volcanoes

• Geysers, Fumaroles, Plug Volcanoes, Shield Volcanoes

• Stratovolcanoes, Lava Domes, Plug Volcanoes, Shiels Volcanoes

• Fumaroles, Cinder Cones, Shield Volcanoes, Lava Domes

4. Which type of volcanic eruption is the largest and most violent? pg. 20-22

• Vulcanian
• Hawaiian
• Strombolian
• Plinian

5. Name two tools that volcanologists use to study volcanoes. pg. 31 (Select two)

• Seismographs

• Rulers

• Infrared Cameras

• iPhone

6. Partially melted rock becomes this when it reaches the Earth's surface:

• fault
• magma
• lava
• crater

7. On what pages in the book would you find information about Mount St. Helens?

• pg. 36-37

• pg. 42-43

• pg. 38-39

• pg. 27-28

8. Which is a volcano that has not had any eruptions in the last 10,000 years and is not expected to erupt again? pg. 15

• A dormant volcano
• An extinct volcano
• An active volcano

9. Volcanoes can have good effects. Why is the richest soil often found in places with volcanic activity? pg. 32

• The soil makes the farmers a lot of money

• There are no minerals or nutrients in the soil

• it provides heated water and steam to produce electricity

• Volcanic rock is filled with minerals and nutrients that plants need to grow

10. Which is a scale that scientists use to compare volcanic eruptions?

• Richter Scale
• Seismograph
• Volcanic Explosivity Index