1. The following are components of magma EXCEPT:
A. Silica B. Carbon C. Iron D. Different gases
2. It affects the shape and steepness of the volcano and determines the eruptive
style of a volcano.
A. Amount of magma C. Temperature of magma
B.Content of magma D. Viscosity of magma
3. What causes magma to erupt towards the earth’s surface?
A. The silica in the magma
B. The density of the magma
C. Gravity of the lithosphere
D. Dissolved gases trapped in the magma.
4. This happens when temperature of lava increases.
A. It begins to harden C. Its viscosity increases
B. Its viscosity decreases D. It can flow on short distance5. Explosive volcanoes tend to have ______________.
A. Low viscosity magma C. High viscosity magma
B. Gentle, sloping sides D. Gases rich in sulfur dioxide
6. Which arrangement of magma types illustrates a decreasing order of viscosity?
A. Basaltic, andesitic, rhyolitic C. Andesitic, basaltic, rhyolitic
B. Rhyolitic, andesitic, basaltic D. Basaltic, rhyolitic, andesitic
7. What is the relationship between silica and the viscosity of the magma?
A. The magma that is poor in Silica the higher the viscosity.
B. The magma rich in silica the higher the viscosity.
C. The magma that is poor in silica the lesser the viscosity.
D. The magma that is rich in silica the lesser the viscosity.
8. Which is true about the relationship between temperature and viscosity?
A. The higher the temperature the higher the viscosity.
B. The higher the temperature the lesser the viscosity.
C. The lower the temperature the higher the viscosity.
D. The lower the temperature the lesser the viscosity.
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Answer:
B
c
d
a
B
a
c
d
Explanation:
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