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8Ga Building up
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8Ga Metal properties
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8Gb Corrosion
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8Gc Metals and water
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8Gd Metals and acids
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8Ge Pure metals and alloys
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8Ha Disaster!
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8Ha Rocks and their uses
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8Hc Weathering and erosion
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8Hd Sedimentary rocks
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8He Living in danger
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8He Materials in the Earth
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Formula writing and balancing equations.