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2
|
a type of rock usually showing layers
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4
|
a rock witha gritty texture, reddish brown
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7
|
a process of breaking up or wearing away rock
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8
|
a type of rock that changes into another rock from earth's heat and pressure
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9
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harmful materials added to the environment
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12
|
reduce, reuse, and recyle our natural resources
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15
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an igneous rock that has visible crystals of minerals
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1
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rock that contains metal or other minerals
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3
|
a material from earth useful to people
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5
|
loose material covering the earth's surface
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6
|
this rock floats
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10
|
a mineral used in watches
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11
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a metamorphic rock with streaks of color from granite heating and changing
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13
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a process of carrying weathered rock from one place to another
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14
|
a type of rock formed through volcanic activity
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