mineral groups
92% of Earth’s crust is composed of which mineral group?
a. Silicates
b. Halides
c. Sulfides
d. Carbonates
a. Silicates
What element makes up the highest percentage of the Earth’s crust?
a. Oxygen
b. Silicon
c. Aluminum
d. Iron
a. Oxygen
Which mineral is a prominent example of tetrahedral crystal structure?
a. Halite
b. Fluorite
c. Quartz
d. Barite
c. Quartz
A tetrahedron crystal structure has how many faces and vertices?
a. 3 faces, 4 vertices
b. 4 faces, 4 vertices
c. 4 faces, 6 vertices
d. 6 faces, 4 vertices
b. 4 faces, 4 vertices
When is the test?
Monday
Which of these formulas belongs in the carbonate group?
a. SrSO4
b. CaF2
c. CaCO3
d. FeS2
c. CaCO3
Which mineral group is composed of a phosphorus (P) bonded with oxygen (O) and one or more positive ions?
a. Carbonates
b. Sulfides
c. Halides
d. Phosphates
d. Phosphates
In a mineral tetrahedra, what is typically found at the vertices?
a. Oxygen atoms
b. Silicon or aluminum atoms
c. Carbon atoms
d. Hydrogen atoms
b. Silicon or aluminum atoms
Which elements are most commonly found at the midpoints of tetrahedral edges in minerals?
a. Silicon atoms
b. Oxygen atoms
c. Aluminum atoms
d. Carbon atoms
b. Oxygen atoms
What is the test on?
The information from the tetrahedron packet and mineral groups packet.
Which mineral group contains compounds with sulfur and metals?
a. Sulfates
b. Oxides
c. Sulfides
d. Carbonates
c. Sulfides
What are halides?
a. Compounds containing phosphorus and oxygen
b. Minerals made of pure elements
c. Salts formed with halogen atoms
d. Compounds containing sulfur
c. Salts formed with halogen atoms
All of these minerals exhibit a tetrahedral crystal structure except:
a. Ruby
b. Garnet
c. Olivine
d. Pyroxene
a. Ruby
What shape is a tetrahedron?
a. Polyhedron
b. Rhombus
c. Sphere
d. Hexagon
a. Polyhedron
How important is it that you complete the study guide?
VERY!!! Please trust me and do it!
What is the chemical formula for fluorite (also known as calcium fluorite)?
a. CaCO3
b. CaF2
c. SiO2
d. FeS2
b. CaF2
What happens when most carbonate minerals react with acid?
a. They produce gas bubbles
b. They change colors
c. They dissolve completely
d. They become harder
a. They produce gas bubbles
Which property of minerals is NOT influenced by tetrahedral structure?
a. Hardness
b. Cleavage
c. Weight
d. Optical behavior
c. Weight
Why is understanding the tetrahedral crystal structure essential for mineralogists and crystallographers?
a. Because their job is to study shapes
b. Because they only study tetrahedrons
c. It provides insights into if minerals are solids or liquids
d. It provides insights into the physical and chemical properties of minerals
d. It provides insights into the physical and chemical properties of minerals
What are we doing for lab on Friday?
Building a tetrahedron with marshmallows and toothpicks
Which of these is an example of a native Earth element mineral?
a. Hydrogen
b. Oxygen
c. Mercury
d. Gold
d. Gold
Which of these is a characteristic of oxide minerals?
a. They react easily with other substances
b. They are typically soft
c. They are usually dense and hard
d. They dissolve readily in water
c. They are usually dense and hard
The tetrahedral motif serves as a ______ for crystal lattices.
a. Map
b. Grid
c. Instruction sheet
d. Building block
d. Building block
True or false?
In a regular tetrahedra, all edges are equal, and all faces are equilateral triangles.
True
How can you get extra credit on your test?
By bringing back the study guide completed on Monday.