Rocks & Minerals

Which of the following is NOT a defining characteristic of minerals?

• crystalline structure

• inorganic

• definite chemical composition

• forms from magma deep within the earth

Which of the following is not a major group of minerals?

• Oxides

• Halides

• Actinides above #92

• Silicates

Galena, a lead ore, has the chemical formula PbS. To which mineral group does this belong to?

• Sulfides

• Sulfates

• Halides

• Native elements

Calcite reacts to acid, producing bubbles, due to the presence of which polyatomic ion?

• SO₄^2-

• CO₃^2-

• S^2-

• O^2-

Halides are minerals that contain ions from which group on the periodic table?

• Group 2 alkaline earth metals

• Group 1 alkali metals

• Group 17 halides

• Group 18 noble gases

Bauxite, which has the formula Al₂O₃, belongs to which mineral group?

• sulfide

• sulfates

• carbonates

• oxides

Which of the following is NOT a property of minerals

• luster

• streak

• hardness

• sea shells

________ igneous rocks have large crystals

• Extrusive

• Intrusive

• Clastic

• Foliated

Igneous rocks w/ small or no crystals are classified as ____.

• extrusive

• intrusive

• foliated

• nonfoliated

Large crystals in igneous rocks form as a result of ________.

• fast cooling

• slow cooling

• volcanic eruptions

• weathering and erosion