Volcano Introductory Internet Activity
Ms. Ripley
Name:___________________________
Instructions:
Go to this site and answer the following questions:
http://www.nationalgeographic.com/forcesofnature/interactive/index.html?section=v
What is a Volcano? Section 1.
1. What is a volcano and what comes out from the Earth’s surface?
2. How many active volcanoes are active today? Where are the majority of them?
3. What happens if a volcano erupts suddenly?
4. What benefits are associated with volcanoes?
Where do Volcanoes Occur? Section 2
5. What is the ring of fire?
6. Where do Volcanoes occur?
How do Volcanoes Form? Section 3
7. What is an island arc volcano?
8. Where do intraplate volcanoes occur?
Volcano Introductory Internet Activity
Ms. Ripley
Name:___________________________
9. How are intraplate volcanoes caused?
10. What happens in spreading centers?
11. What is subduction?
12. Explain how the Great Rift Valley was formed.
Types of Volcanoes. Section 4
13. Give the meat and potatoes for the following volcano types:
Volcano Type
Cinder Cone
Caldera
Composite
Shield
Submarine
Meat and Potatoes
Example
Volcano Introductory Internet Activity
Ms. Ripley
Name:___________________________
Lava Dome
How do Volcanoes Erupt. Section 5
14. What two traits characterize volcanoes?
15. When does a eruption begin?
16. What determines whether or not an eruption will be explosive or non explosive?
17. What determines magma viscosicty (the ability to resist flow)?
18. What is the difference between low amounts of silica and high amounts of
silica?
19. What are the 3 ways that volcanoes can erupt?
20. Are volcanoes that are considered extinct ever able to erupt again?
Make your own Volcano. Section 6
21. What happens when you have a volcano with high levels of dissolved gas and
silica?
Volcano Introductory Internet Activity
Ms. Ripley
Name:___________________________
22. Which type of volcano produces very fluid lava flows?
23. How is a lava dome created?
24. What creates a cinder cone volcano?
25. What type of volcano is Paricutin in Mexico?
26. Describe what happens in the four types of volcanoes when the erupt. (For
example – what do you see on the screen when the erupt? Long lava flows???)
Type of Volcano
Shield Volcano
Composite Volcano
Cinder Cone Volcano
Lava Dome Volcano
What happens upon eruption?