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Ch.2 (FInal)


(T/F) A mineral is defined as a crystalline solid that is naturally occurring, has a specific chemical composition and forms through geologic processes. True
(T/F) The atomic mass number is equal to the number of neutrons in an atom. False
(T/F) The atomic number of an element is equal to the number of protons in each atom. True
(T/F) Rocks are defined as naturally-formed aggregates of minerals or mineral-like substances. True
(T/F) Silica is a term for oxygen combined with silicon. True
(T/F) Both graphite and diamond are made of carbon. True
(T/F) All of the most common rock-forming minerals in Earth's crust are silicate minerals. True
(T/F) Minerals that have the same chemical composition but have different crystalline structures exhibit polymorphism True
(T/F) Color is the least reliable physical property in mineral identification. True
In order for a particular type of material to be classified as a mineral, it must ____. All of the answers are correct.
The atomic number of an element equals the number of _____ in each atom. protons
_______ of an element are atoms containing different numbers of neutrons but the same number of protons Isotopes
The two most abundant elements in Earth's crust are __. oxygen and silicon
The _____ group and the ___ group are sheet silicates characterized by one direction of cleavage. mica; clay
Two examples of framework silicates are _____ and ______. quartz; feldspar
_____ is the ability of a mineral to break, when struck or split, along preferred planar directions. Cleavage
A silica tetrahedron is composed of four atoms of the element ___ and one atom of __. oxygen; silicon
The common mineral ___ is an example of an isolated silica tetrahedron structure. olivine
Five of the six minerals collectively known as asbestos contain single chains of silica tetrahedral and belong to the _______. pyroxenes
The ______ group of minerals is characterized by two parallel chains of silica tetrahedra in their structure amphibole
The _____ group of minerals are sheet silicates mica
The mineral ___ is an example of a native element. graphite
The third most abundant element in the Earth's crust is ______; it is more common than iron. aluminum
____ is the most common element in the Earth's crust. Oxygen
____ elements make up 98% of the Earth's crust. 8
The most common minerals in the Earth's crust are the _______. silicates
On Mohs' scale of hardness your fingernail has a value of ____. 2.5
Created by: Thomas.Siu