ch.26 Flashcards
What is a naturally occurring inorganic solid with a crystalline form?
mineral
What is the color of a mineral in powdered form called?
streak
What is it called when a mineral breaks along preferred planes of weakness creating sets of smooth parallel sides?
cleavage
What do minerals that break with irregular surfaces exhibit?
fracture
What is the physical property that measures a mineral’s resistance to scratching ?
hardness
What is molten rock material inside earth called?
magma
A mineral is ___,____,___
naturally occurring, inorganic solid, crystalline form
What are the two most abundant elements that make up Earth’s crust?
Oxygen and Silicon
What does inorganic mean?
Material that is non-living
What does the arrangement of an atom and the bonds between them reflect about a mineral?
the way it breaks, how hard it is, and what types of crystal shape it has
What are all of the ways to identify minerals?
Fracture, Luster, Streak, Hardness, Cleavage, Atomic Arrangement, Crystal Shape
What are the two types of luster?
Metallic and non-metallic
How does non-metallic luster reflect light?
shine like glass or appears earthy or waxy
How does metallic luster reflect light?
very easily like a piece of metal
How do you perform a streak test?
rubbing a mineral on an unglazed, white or black,porcelain tile.
What are the two types of breakage that can happen to a mineral?
Cleavage and Fracture
What is the name of the scale to measure the hardness of a mineral?
Mohs Scale
What is the number range on Mohs Scale of Hardness?
1-10
How many different crystal shape systems are there ?
6
Minerals grow from the ___
atoms added to its surfaces, edges, or corners
What are the 3 ways minerals can form?
Hot water, molten rock, and evaporation
What are the two minerals groups?
Silicate and non-silicate minerals
Which mineral group is the most abundant in Earth’s crust?
Silicates
What elements are Silicates made up of?
silicon and oxygen
Non-silicates do not contain what element ?
silicon-oxygen or silicates
What mineral is used to make glass?
Silica
What is a naturally formed mixture containing minerals, rock fragments, and volcanic glass?
A Rock
How are rocks identified?
by their composition and texture
What does the texture of a rock describe about a rock?
size, shape, and arrangement of the rocks components
Where do Intrusive igneous rocks form?
underground or on Earth’s surface