Minerals Quiz
Rub the mineral against a piece of unglazed porcelain
How can you find the streak of a mineral?
Observe with our eyes
How do we identify the color of a mineral?
grams per cubic centimeter
How is density measured?
Fluorescence Magnetism Chemical Reaction Taste Optical Radioactivity
List some special properties that SOME minerals have that others do not.
Radium and Uranium
Name 2 minerals that are radioactive.
Magnetitie and Pyrrhotite
Name 2 natural magnets that attract iron.
Halite, salty
Name a mineral that has a taste, and tell what it tastes like.
Color Caleb's Luster Lamborghini Density Does Hardness Have Fracture Five Cleavage Clean Streak Seats
Name the 7 characteristics we use to identify minerals
Crystalline structure
Of the 4 properties that identify a mineral, which is the hardest to answer (figure out)?
Colors
Some minerals, like Quartz, come in a wide variety of ___________.
FALSE Sometimes the color of a mineral is different than the color of its streak. That's why these are 2 separate properties.
T/F The color of a mineral will always be the same as the color of its streak
arrangement (or pattern)
The shape of a crystal is determined by the __________________ of the atoms or molecules.
Impurities and Exposure (to air and water)
What changes the outward color of a mineral
unglazed porcelain (streak plate)
What do you rub a mineral against to test its streak?
fizz or bubble
What does calcite do when you put acid on it?
color
What is NOT a good way to identify a mineral?
A mineral is a..... --Naturally-formed --Inorganic --Solid [with] --Crystalline structure
What is a mineral?
water
What substance is used as a reference point for density. (It has a density of exactly 1 g/cm so we compare the density of other substances to it)
Some minerals have a variety of colors. Some minerals change colors
Why is color not a good way to identify a mineral?
hardness
a mineral's resistance to being scratched
compound
a substance made by 2 or more elements that have been chemically combined
metallic
bright and reflective
submetallic
dull and semi-reflective
nonmetallic
glassy, greasy, fibrous, creamy, rough, dull plastic
Density
how much matter is in a given amount space
crystal
occurs when there is a repeating pattern of atoms or molecules in a material
streak
the color of a mineral in powder form
streak
the color of a mineral in powdered form.
diamond
the hardest mineral
luster
the property of minerals that says whether something is shiny or dull
Specific Gravity
the ratio of an object's density when compared to the density of water is called.....
fracture
the tendency of minerals to break along uneven surfaces (example: Quartz)
cleavage
the tendency of some minerals to break along smooth, flat surfaces (example: Mica)
streak plate
the tool we use to find out what a mineral's color is in powdered form
luster
the way a mineral reflects light
Flourescent
Calcite and fluorite glow under ultraviolet light, so they are _________________
it causes a double image when placed over an image
Clear calcite has an optical property. What does it do?
Mass, Volume
Density is a ratio (fraction) of a object's _______ compared to it's _________
scale of 1-10 that measures the hardness of minerals
Describe the Mohs Hardness Scale
atom
Each element is made of only one type of ....
Streak is not affected by air or water
Explain why Streak is more reliable than color in identifying a mineral.
properties
We identify minerals by noting different _____________.