Minerals
What's the name of the scale that measures the Hardness property?
Mohs
What are the 3 classes of rocks?
igneous, sedimentary, metamorphic
Define Luster
the way a mineral reflects light
the way light is reflected by a mineral’s surface and how brilliant or dull it is
I may look pink, white, or gray,
But color alone can mislead.
To truly identify me,
My powder is what you need.
streak
Shale forms as particles settle in slow-moving water.
What type of rock is shale?
sedimentary
True or False: Ivory is a mineral. It is a hard, solid, white material that comes from the tusks, or teeth, of animals, usually elephants.
False
Rocks are
are made of a mixture of minerals
the appearance of the freshly broken surface of a mineral.
fracture
You press me with force and heat,
But I never liquefy.
My minerals rearrange inside—
That’s how I modify.
methaphormism
Out of all the properties of a mineral, which one is a chemical property used to identify minerals?
reactivity
Name the properties of all minerals
streak
hardness
color
reactivity
luster
What two variables are required to convert sedimentary or igneous rock into metamorphic?
heat and pressure
a substance that is found naturally in the Earth and that does not contain plant or animal matter.
mineral
Which type of rock was the first to exist on the planet?
igneous
Which of the following would be a clue that a rock is metamorphic?
It has ribbon-like layers, or bands.
What would be a clue that a substance is a mineral?
it is not a liquid or a gas
it appears on the periodic table of elements
it is inorgarnic
Which of the following would be a clue that a rock is igneous?
Streak describes what property?
internal color
Why do you need to run several tests before you can identify a mineral with 100% certainty?
many minerals share similar physical properties
What four steps are necessary for a rock to break down and reform as sedimentary rock?
weathering
erosion
deposition
compaction
When might a streak test be useful?
when a mineral comes in different colors
when two minerals have similar main colors
when a mineral is multicolored
Diorite is a rock with crystals. It can form when molten lava cools down in the Earth’s crust. Diorite is most likely a(n) ________ rock.
extrusive igneous rock
hot, molten rock below the Earth's surface. It is called lava when it erupts from a volcano.
magma
The most common type of rock on Earth is?
granite
Talc has a hardness of 1, so it can be scratched very easily. Diamond has a hardness of 10. No other mineral can scratch it. A penny has a hardness of 3.5, and glass has a hardness between 5.5 and 6.
What could be the Mohs scale number for a mineral that is harder than talc, but softer than a penny?
A mineral harder than talc, but softer than a penny must have a hardness between 1 and 3.5.