CH 26 Flashcards
A naturally occurring inorganic solid with a crystalline form.
Mineral
The color of a mineral in powdered form.
Streak
When a mineral breaks along preferred planes of weakness creating sets of smooth parallel sides.
Cleavage
Minerals that break with irregular surfaces.
Fracture
The physical property that measures a mineral’s resistance to scratching.
Hardness
Molten rock material inside Earth.
Magma
A mineral is a ____________________________________________.
naturally occurring, inorganic solid, with crystalline form
What are the two most abundant elements that make up Earth’s crusts?
Oxygen and silicon
What does inorganic mean?
It means that minerals are materials that are not living
What does the arrangement of an atom and the bonds between them reflect about a mineral?
The way a mineral breaks, how hard it is, and what types of crystal shape it has
What are all the ways to identify minerals?
Luster, streak, cleavage, fracture, hardness, and crystal shape
What are the two types of luster?
Metallic and nonmetallic
How does metallic luster reflect light?
It reflects light in a way that a metal surface might
How does NONmetallic luster reflect light?
It shines like glass or appear earthy or waxy
How do you perform a streak test?
By rubbing a mineral on an unglazed, white porcelain tile
What are the two types of breakage that can happen to minerals?
Cleavage and fracture
What is the name of the scale to measure the hardness of a mineral?
The Mohs Scale of Hardness
What is the number range on Mohs Scale of Hardness?
From 1 through 10
How many different crystal shape systems are there?
There are 6: Cubic, hexagonal, tetragonal, orthorhombic, monodinic, and triclinic
Minerals grow from the _______.
atoms that are added to its surfaces, edges, and corners, or in other words, from inside out
What are the 3 ways minerals can form?
From hot water, evaporation, and molten rock
What are the two mineral groups?
Silicates and nonsilicates
Which mineral group is the most abundant in Earth’s crust?
Silicate minerals
What elements are silicates made up of?
Oxygen and silicon, otherwise known as silicon dioxide
Nonsilicates do not contain what element?
Silicon
What mineral is used to make glass?
Quartz
Define rock
A naturally formed mixture containing minerals, rock fragments, and volcanic glass.
How are rocks identified?
By their composition and texture.
What does the texture of a rock describe about a rock?
Its size, shape, arrangement of the rock’s components.
Where do intrusive igneous rocks form?
Underground or on Earth’s surface.
What type of molten rock does intrusive igneous rocks form from?
Magma
What is the name of the series that illustrates simultaneous crystallization of silicate minerals?
Magma chamber
What are the 3 types of magma?
Mafic, intermediate, and felsic