Exam 2: Rocks: Materials of the Solid Earth

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Layers in sedimentary rocks are called ________.

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beds

In order to metamorphose, metamorphic rocks must melt.

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False

An igneous rock that shows a vesicular texture ________.

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D

Heat, confining pressure, differential stress, and ________ are four agents that drive metamorphic reactions.

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  Consult the image that depicts Bowen's reaction series. What can be said of the temperature at which a granite crystallizes? Consult the image that depicts Bowen's reaction series. What can be said of the temperature at which a granite crystallizes?

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Three of the following statements about mechanical weathering are true. One is false. Which statement is incorrect?

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Discuss how the following variables influence the rate of weathering: Mineral content, climate, and topography.

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Match the items with the correct descriptions.
Reactions that take place, often facilitated by water, to new produce products, mainly clay minerals, which are stable at Earth's surface.
Differential stress
The reaction of a substance (often a metal ion) with oxygen. Rust is an example.
Confining pressure
The breaking of rock into smaller pieces.
Frost wedging
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Reactions that take place, often facilitated by water, to new produce products, mainly clay minerals, which are stable at Earth's surface.
Differential stress
The reaction of a substance (often a metal ion) with oxygen. Rust is an example.
Confining pressure
The breaking of rock into smaller pieces.
Frost wedging
When water freezes, it expands in volume. Water-filled cracks can be enlarged when this new ice exerts outward pressure on the walls of the fracture.
Sheeting
The expansion of rocks that formed under high confining pressure, once they are uplifted and exposed at Earth's surface producing fractures that are broadly curved and parallel to the land surface.
Oxidation
Pressure that is unequal in different directions, such as results from the convergence of tectonic plates (mountain-building)
Carbonic acid
A substance that forms when carbon dioxide in the air combines with water. It is an important agent of chemical weathering.
Mechanical weathering
Pressure that is equal in every direction, such as results from the burial of sediments
Chemical weathering
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Which of the following rock types represents the highest grade of metamorphism?

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  In general, which of the statements below best describe what happens in terms of composition as crystallization proceeds down the Bowen's reaction series (shown in the figure)? In general, which of the statements below best describe what happens in terms of composition as crystallization proceeds down the Bowen's reaction series (shown in the figure)?

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What is the source of energy that transforms igneous rocks into sedimentary rocks? What is the source of energy that transforms sedimentary rocks into metamorphic rocks? What is the source of energy that transforms metamorphic rocks into igneous rocks? Are these sources of energy internal or external? Explain.

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Rusting is an example of mechanical weathering.

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Given the right conditions any kind of rock can be transformed into any other kind of rock.

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The rock ________ is a description of how one rock may be transformed into another kind of rock through various internal and external processes.

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  What form of physical weathering is shown in this image? What form of physical weathering is shown in this image?

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All varieties of limestone are dominated by the mineral calcite.

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Frying an egg is a non-geological example of contact metamorphism.

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A large proportion of feldspar sets arkose apart from regular sandstone.

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Which one of the following is an igneous rock?

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Which rock type is most likely to have been deposited in a high- energy environment (such as a very turbulent stream)?

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