Download Magma Viscosity Quiz

GeoScience Videos Assessment for Magma Viscosity & Gas Content
1. Viscosity refers to
a) the density of a fluid material.
b) the gas content of a fluid.
c) the temperature and gas content of a fluid
d) the resistance to flow of a fluid.
2. Which list of materials is in order from lowest viscosity to highest viscosity?
a) Water, honey, peanut butter, mayonnaise
c) Olive oil, mayonnaise, ketchup, water
b) Gasoline, ketchup, mayonnaise, olive oil
d) Milk, olive oil, honey, peanut butter
3. The volume of magma will increase as it rises through the crust and comes closer to Earth’s
surface.
a) True
b) False
4. Magma viscosity is primarily dependent upon which combination of factors?
a) Water content and temperature of magma.
b) Water content and pressure of magma.
c) Depth of magma source and gas content of magma.
d) Composition and temperature of magma.
e) Basalt content and gas content of magma.
5. Which pair of terms would make the best match to fill the blanks in the following sentence?
Gases escape more easily from a
viscosity magma; that is why eruptions are more
violent from volcanoes that are supplied by
viscosity magma.
a) High, low
b) Low, low
c) Low, high
d) High, high
6. Which type of volcano is associated with the more viscous magma?
a) Shield volcano
b) Composite volcano
7. Which is the most accurate statement about viscosity and magma?
a) Mafic magmas are hotter and have higher viscosity than felsic magmas
b) Magmas from composite volcanoes have relatively high viscosity
c) High viscosity magmas flow at higher speeds than low viscosity magmas
d) The viscosity of magma is related to the amount of gas dissolved in the magma
Answer Key. 1. d); 2. d); 3. a); 4. d); 5. c); 6. b); 7. b)