Minerals/Tectonic plates Flashcards

1
Q

What defines a mineral?

A

inorganic
natural
crystalline
definite physical properties

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2
Q

what is cleavage?

A

breaks into smooth/flat surfaces

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3
Q

what is fracture?

A

irregular breakage

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4
Q

what is hardness?

A

resistance to scratching

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5
Q

what is silicates?

A

SiO4
most abundant

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6
Q

evidence of continental drift?

A
  1. ocean floor topography (MORs and trenches)
  2. magnetic stripes on sea floor
  3. ocean floor rock ages
  4. hot spots at plate boundaries
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7
Q

oceanic-oceanic plate convergence forms..

A

island arcs

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8
Q

oceanic-continental plate convergence forms..

A

volcanic arcs

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9
Q

continental-continental plate convergence forms..

A

mountains

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