WorksheetsMagma and Volcanic Eruptions
Total questions: 15
Worksheet time: 8mins
Which choice best describes viscosity?
low viscosity fluids are thick
high viscosity fluids are runny
high viscosity fluids are thick
Which types of magmas have the lowest viscosity?
granitic
basaltic
andesitic
rhyolitic
Which types of magma have the highest viscosity?
ultramafic
basaltic
andesitic
rhyolitic
Continental crust produces magmas that are higher in
iron
magnesium
silica
calcium
Oceanic crust tends to produce magmas that are high in
iron
silica
aluminum
sodium
The magma type that is highest in silica is
andesitic
basaltic
rhyolitic
ultramafic
Which two places would would you most likely have volcanoes that produce basaltic magma?
Yellowstone and Indonesia
The Andes and The Cascades
Japan and Alaska
Hawaii and Iceland
Other than the Andes, what other mountain range is famous for andesitic volcanoes
The Rocky Mountains
The Cascades of Washington and Oregon
The Appalachians
What type of magma has led to the massive Yellowstone Caldera eruptions?
Andesitic
Basaltic
Rhyolitic
Ultramafic
Water has the effect of
raising the melting point of rock in the crust.
lowering the melting point of rock in the crust.
creating higher temperatures in the crust.
almost no effect on rock in the crust.
Which of the following is a volcanic rock?
andesite
diorite
gabbro
granite
Which of the following is the correct ranking of tephra from smallest to largest in size?
bombs, blocks, ash
block, bombs, ash
ash, blocks, bombs
ash, bombs, blocks
Which of the following ranks magmas in terms of viscosity from lowest to highest
andesitic, basaltic, rhyolitic
basaltic, andesitic, rhyolitic
rhyolitic, andesitic, basaltic
basaltic, rhyolitic, andesitic
Which of the following correctly ranks magmas in terms of silica content, from highest percent to lowest percent?
andesitic, basaltic, rhyolitic
basaltic, andesitic, rhyolitic
rhyolitic, basaltic, andesitic
rhyolitic, andesitic, basaltic
The more dissolved gases in magma
the quieter it erupts.
the more explosive it erupts.
the less viscous it is.
