Ch. 3 Flashcards

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1
Q

Are all minerals brittle?

A

No some are tho

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2
Q

Is limestone radioactive?

A

No and most minerals aren’t

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3
Q

What are most minerals?

A

Silicate

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4
Q

What’s the ability of a mineral to glow and change under a ultra violet light?

A

Fluorescence

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5
Q

What’s the way that that a minerals surface reflects the light?

A

Luster

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6
Q

What is ductility?

A

The substances ability to be drawn or pulled into a wire

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7
Q

What’s cleavage?

A

A minerals tendency to split against parallel and flat surfaces

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8
Q

Fracture?

A

Minerals tendency break irregular

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9
Q

What’s streak?

A

The color of powder left by a mineral when it’s rubbed against a hard rough surface.

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10
Q

4 questions scientists ask to identify if the substance is a mineral or not?

A
  • is the substance naturally occurring
  • is the substance inorganic
  • is the substance a crystalline solid
  • does it have a definite Chemical composition
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11
Q

Difference between a rock and a mineral?

A

a mineral is a rock but a rock isn’t a mineral Bc rocks are mad up of many different minerals where as a mineral has a definite chemical composition

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12
Q

Why are some minerals metals but others aren’t?

A

Some are alloys which are combinations of metals. Alloys can’t be minerals Bc they don’t have a definite chemical composition

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13
Q

How are ores strand formed into metals?

A

By separating with magnets, electricity, or by heating to high temperatures in the presence of carbon or carbon monoxide

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14
Q

How is hardness determined using the field scale?

A

You do experiments included in the field hardness scale and then compare those findings to MOHs hardness scale

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15
Q

Are metals valuable?

A

Yes Bc they are good conductors of heat and electricity, but answer=all of the above

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16
Q

What’s the hardest mineral on the MOHs scale

A

Diamond

17
Q

Can u positively identify a mineral after doing one test?

A

No u must do more than one Bc some minerals share the same characteristics

18
Q

Two basic types of minerals?

A

Silicate and non silicate

19
Q

True or false

Minerals are organic

A

False they are inorganic

20
Q

Only some minerals can…

A

Have double refraction

21
Q

Essay: How do you use minerals responsibly.

A

Minerals are naturally made. The earth will not produce any more than we already have, because of this we must recycle them, not waste them, and use less of them.

22
Q

Can taste be used to identify all minerals?

A

No Bc some are poisonous