2. Created by Terri Street Copyright, 2000

3.  1,000,0001,000,000  500,000500,000  250,000250,000  125,000125,000  64,00064,000  32,00032,000  16,00016,000  8,0008,000  4,0004,000  2,0002,000  1,0001,000  500500  300300  200200  100100

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7.  A. active A. active  C. dormant C. dormant  B. extinct B. extinct  D. fissure D. fissure The type of volcano is most likely to erupt in the future is a(n) _____________ volcano.

8. Back to Board  A. active

9.  A. acid rain A. acid rain  C. silica C. silica  B. fumaroles B. fumaroles  D. magma D. magma Magma that produces an explosive eruption is usually rich in _________.

10. Back to Board C. silica

11.  A. shield A. shield  C. strato C. strato  B. caldera B. caldera  D. cinder cone D. cinder cone Which of the following is not a type of volcano?

12. Back to Board B. caldera

13.  A. low silica A. low silica  C. high silica C. high silica  B. high elasticity B. high elasticity  D. low elasticity D. low elasticity Lava that flows easily has a ________ ___________ content

14. Back to Board A. Low silica

15.  A. mudflows A. mudflows  C. water C. water  B. tephra B. tephra  D. magma D. magma The underground movement of _____ causes small earthquakes before a volcanic eruption.

16. Back to Board D. magma

17.  A. divergent boundaries A. divergent boundaries  C. convergent boundaries C. convergent boundaries  B. hot spots B. hot spots  D. mid-ocean ridges D. mid-ocean ridges The most explosive volcanoes occur at _______ _______.

18. Back to Board C. Convergent boundaries

19.  A. volcanic neck A. volcanic neck  C. plate boundary C. plate boundary  B. magma chamber B. magma chamber  D. eruption column D. eruption column A ________ _________ is where molten rock accumulates deep underground.

20. Back to Board B. Magma chamber

21.  A. silica A. silica  C. tephra C. tephra  B. a volcanic neck B. a volcanic neck  D. a sill D. a sill When magma explodes into the air, cools, and hardens, ____________ forms.

22. Back to Board C. tephra

23.  A. Dormant A. Dormant  D. Shield D. Shield Lava flows are the most dangerous effect of ___________ volcanoes.  C. Composite C. Composite  B. Cinder cone B. Cinder cone

24. Back to Board D.shield

25. Most of the gas that is emitted from a volcanic fumaroles consist of _____.  A. lava A. lava  C. magma C. magma  D. silica D. silica  B. water vapor B. water vapor

26. Back to Board B. Water vapor

27.  A. northwest A. northwest In what region of the continental US do many volcanoes occur?  C. southwest C. southwest  B. northeast B. northeast  D. southeast D. southeast

28. Back to Board A. Northwest

29.  B. viscosity B. viscosity What is the word that describes how freely a liquid flows?  A. rigidity A. rigidity  C. silicosity C. silicosity  D. solidification D. solidification

30. Back to Board B. viscosity

31.  C. pyroclastic flow C. pyroclastic flow What is the word used to describe very hot solid and gases that flow down the slopes of a volcano?  A. elasticity A. elasticity  B. water vapor B. water vapor  D. calderas D. calderas

32. Back to Board C. Pyroclastic flow

33.  D. hot spot D. hot spot On what type of location does Hawaii rest?  A. convergent boundary A. convergent boundary  C. Fault line C. Fault line  B. Divergent boundary B. Divergent boundary

34. Back to Board D. Hot Spot

35.  A. sills A. sills When magma enters a crack parallel to rock layers and hardens, ___________ are formed.  B. dikes B. dikes  D. volcanic necks D. volcanic necks  C. calderas C. calderas

36. A. Sills

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