Exercise
Real-World Examples and Rock Identification
Questions
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MultiChoice
If you find a dark, fine-grained rock on a ocean volcanic island, what is it likely to be?
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MultiChoice
If you find a light-colored rock with visible quartz, feldspar, and mica crystals, what is it?
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MultiChoice
A rock displays clear light and dark mineral bands. How should it be classified?
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MultiChoice
A rock is lightweight, full of tiny holes, and floats on water. What rock is this?
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MultiChoice
A dark, glossy rock looks like natural black glass with sharp edges. What is its name?
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MultiChoice
A smooth rock splits easily into thin flat sheets and is used for roofing slate. What is it?
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MultiChoice
A rock is composed of shell fragments cemented together by calcite. What rock is it?
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MultiChoice
You find a sedimentary rock composed of smooth, rounded river pebbles cemented in sand. What is it?
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MultiChoice
A very hard metamorphic rock formed from quartz sandstone scratches glass and does not fizz with acid. What is it?
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MultiChoice
A soft non-foliated metamorphic rock fizzes when acid is applied and is used in sculptures. What is it?
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MultiChoice
A dark sedimentary rock is soft, flammable, and made of compressed ancient swamp plants. What is it?
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MultiChoice
How can a geologist determine whether an igneous rock cooled intrusive underground or extrusive above ground?