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Name an igneous rock that has many tiny holes, is lightweight and crumbly.
Pumice
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Describe the rock cycle.
Three basic types of rocks changing from one type into another.
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What is an ore?
An ore is mineral-bearing rock.
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Give at least three examples of metamorphic rocks and what they used to be.
- granite - gneiss
- limestone - marble
- sandstone - quartzite
- shale - slate
- slate - shist
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Name the properties used to identify rock-forming minerals.
cleavage, color, hardness, luster, streak
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Why is color not the best property for identifying minerals?
Many different minerals have the same color.
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Describe the size and texture of the crystals in an igneous rock that has cooled slowly?
The crystals will be large and have a rough texture.
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What is Moh's Scale of Hardness?
Moh's scale is used to rank the hardness of minerals. The softest mineral is talc and it is #1. The hardest mineral is diamond, #10.
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Many sedimentary rocks are formed in layers of _________.
sediments
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Metamorphic rocks are formed in extreme ________ and _______________.
heat and pressure
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Which mineral can you scratch with your fingernail, calcite or quartz?
Calcite.
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What would be the best rock to use for constructing a building, sandstone or granite? Why?
Granite. It is very hard.
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Sometimes metamorphic rocks have wavy or straight _________ of color.
Bands
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In which type of rock might you find fossils?
sedimentary
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Which type of rock is formed from magma, lava, or some other type of volcanic action?
Igneous
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Name an igneous rock that is glassy with no visible crystals.
obsidian
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Name the most common mineral on earth.
Feldspar.
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Name at least three uses for igneous rocks.
- granite: building materials
- pumice: cleaning and beauty products
- obsidian: surgical tools
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Name at least three uses for sedimentary rocks.
- limestone: cement, swimming pools
- tile, pottery
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Name at least three uses for metamorphic rocks.
statues, roofs, building materials
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