Ch. 3 Flashcards
Are all minerals brittle?
No some are tho
Is limestone radioactive?
No and most minerals aren’t
What are most minerals?
Silicate
What’s the ability of a mineral to glow and change under a ultra violet light?
Fluorescence
What’s the way that that a minerals surface reflects the light?
Luster
What is ductility?
The substances ability to be drawn or pulled into a wire
What’s cleavage?
A minerals tendency to split against parallel and flat surfaces
Fracture?
Minerals tendency break irregular
What’s streak?
The color of powder left by a mineral when it’s rubbed against a hard rough surface.
4 questions scientists ask to identify if the substance is a mineral or not?
- is the substance naturally occurring
- is the substance inorganic
- is the substance a crystalline solid
- does it have a definite Chemical composition
Difference between a rock and a mineral?
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
Why are some minerals metals but others aren’t?
Some are alloys which are combinations of metals. Alloys can’t be minerals Bc they don’t have a definite chemical composition
How are ores strand formed into metals?
By separating with magnets, electricity, or by heating to high temperatures in the presence of carbon or carbon monoxide
How is hardness determined using the field scale?
You do experiments included in the field hardness scale and then compare those findings to MOHs hardness scale
Are metals valuable?
Yes Bc they are good conductors of heat and electricity, but answer=all of the above
What’s the hardest mineral on the MOHs scale
Diamond
Can u positively identify a mineral after doing one test?
No u must do more than one Bc some minerals share the same characteristics
Two basic types of minerals?
Silicate and non silicate
True or false
Minerals are organic
False they are inorganic
Only some minerals can…
Have double refraction
Essay: How do you use minerals responsibly.
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.
Can taste be used to identify all minerals?
No Bc some are poisonous
