Question 1

Changing the composition of magma by incorporating surrounding host rock is known as________

Accepted Answer

A)  assimilation 
B)  differentiation 
C)  magma mixing 
D)  partial melting 
A)  assimilation 
B)  differentiation 
C)  magma mixing 
D)  partial melting

Question 2

As the silica content varies from less than 40% to more than 70% there is a systematic__________ .

Accepted Answer

A)  decrease in the quartz content of the rocks 
B)  decrease in calcium, magnesium, and iron with an increase in sodium and potassium 
C)  increase in calcium, magnesium, and iron with a decrease in sodium and potassium 
D)  increase in the temperature at which point melting begins 
A)  decrease in the quartz content of the rocks 
B)  decrease in calcium, magnesium, and iron with an increase in sodium and potassium 
C)  increase in calcium, magnesium, and iron with a decrease in sodium and potassium 
D)  increase in the temperature at which point melting begins

Question 3

The most common ferromagnesian silicate minerals by % in igneous rocks are __________.

Accepted Answer

A)  aragonite, barite, calcite, and diamond 
B)  olivine, pyroxene, amphibole, and biotite 
C)  magnetite, chromite, hematite, and ilmenite 
D)  feldspar, quartz, and muscovite 
A)  aragonite, barite, calcite, and diamond 
B)  olivine, pyroxene, amphibole, and biotite 
C)  magnetite, chromite, hematite, and ilmenite 
D)  feldspar, quartz, and muscovite

Changing the composition of magma by incorporating surrounding host rock is known as________

As the silica content varies from less than 40% to more than 70% there is a systematic__________ .

The most common ferromagnesian silicate minerals by % in igneous rocks are __________.

An Introduction to Geology and Plate Tectonics

Minerals: the Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

Earthquakes and Earths Interior

The Ocean Floor

Plate Tectonics: the Framework for Modern Geology

Mountain Building and Continental Frameworks

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Mineral and Energy Resources

Filters

Exam 14: Mass Wasting: the Work of Gravity

Changing the composition of magma by incorporating surrounding host rock is known as________

As the silica content varies from less than 40% to more than 70% there is a systematic__________ .

The most common ferromagnesian silicate minerals by % in igneous rocks are __________.

An Introduction to Geology and Plate Tectonics

Minerals: the Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

Earthquakes and Earths Interior

The Ocean Floor

Plate Tectonics: the Framework for Modern Geology

Mountain Building and Continental Frameworks

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Mineral and Energy Resources

Filters