For each pair of terms, explain how the meanings of the terms differ.

alpine glacier and continental glacier

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Alpine glaciers: that are narrow, wedge formation of ice that is formed on a mountainous regions in small area that is surrounded by mountain’s topography, such as Alaska, Himalaya Mountains, the Andes and the Alps.

Continental glaciers: that are massive sheets of ice that can cover millions of square meters and have thousands of meters in thickness such as Greenland and Antarctica.

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earth science

Categorize each of the three types of volcanoes in terms of the characteristics of magma shown in the table.

	Basaltic Magma	Andesitic Magma	Rhyolitic Magma
Source material	upper mantle	oceanic crusts and sediments	continental crust
Viscosity	low	intermediate	high
Gas content	1-2%	3-4%	4-6%
Silica content	about 50%	about 60%	about 70%
Location of	both oceanic magma tal crust	continental margins associated with subduction zones	continental

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earth science

Categorize each of the three types of volcanoes in terms of the characteristics of magma shown in the table.

	Basaltic Magma	Andesitic Magma	Rhyolitic Magma
Source material	upper mantle	oceanic crusts and sediments	continental crust
Viscosity	low	intermediate	high
Gas content	1-2%	3-4%	4-6%
Silica content	about 50%	about 60%	about 70%
Location of	both oceanic magma tal crust	continental margins associated with subduction zones	continental

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