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10
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Why do rocks undergo partial melting?
Partial melting takes place because rocks are not pure materials. As temperature rises, some minerals melt and others remain solid.
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5
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Why is Earth considered as a thermal engine?
Earth makes some of its own heat. The process of radioactive decay which emits heat energy prevents the Earth from completely cooling off
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5
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What are two categories of the Earth's internal heat source?
Primordial Heat & Radioactive Heat
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boom
Lose 50 points!
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shark
Other team loses 25 points!
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shark
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thief
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5
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Name three places where magma can form
Mid-ocean ridges, mantle plumes, subduction zones
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5
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A more viscous (thick) magma will produce a more violent eruption. The viscosity of magma is controlled by what factors?
Temperature, Silica content, Volatiles/dissolved water
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5
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What temperature and pressure conditions allow magma to form?
High/constant temp and decreased pressure conditions
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monster
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rocket
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fairy
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lifesaver
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5
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Name two examples of volatiles
H2O, CO2
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5
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Enumerate the three heat transfer mechanisms that redistribute the internal heat of Earth
conduction, convection, radiation
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5
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Enumerate three magma formation processes
Decompression melting, heat transfer melting, flux melting
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baam
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star
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fairy
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banana
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10
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Describe Bowen's reaction series
Bowenโs reaction series presents the order of crystal formation from magma as cooling occurs
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trap
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gift
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gift
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baam
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10
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How can density affect the flow of magma?
By density contrast. Density contrast describes how the magma is less dense than the surrounding rock.
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5
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What happens after magma is formed?
Magma rises and escapes as an intrusion or extrusion.
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