When atoms unite by transferring electrons, they should form
a. a polar molecule.
b. a covalent compound.
c. an ionic compound.
d. an organic compound.
[Ques. 2] The physical characteristic that is used to distinguish intrusive igneous rocks from extrusive igneous rocks is _____________.
a. silica content
b. hardness
c. color
d. grain size
[Ques. 3] The sharing of two electrons by unlike atoms generally forms a(n) ______________ bond.
a. ionic
b. metallic
c. nonpolar
d. polar covalent
[Ques. 4] The saying The present is the key to the past is a simple way to state the basic geologic concept called ______________.
a. presentarianism
b. prepostanarism
c. uniformitarianism
d. formitarianism
[Ques. 5] Which of the following compounds would be expected to be hard and brittle and to have a high melting point?
a. H2SO4
b. KBr
c. H2C2O4
d. IF7
[Ques. 6] The scientist ______________ is generally regarded as the father of geology..
a. David Johnston
b. Friedrich Mohs
c. James Hutton
d. Henry Beston
[Ques. 7] What is the correct formula for calcium phosphate?
a. Ca3P2
b. Ca2(PO4)3
c. Ca3(PO4)2
d. Ca2P3
[Ques. 8] A general name for an intrusive igneous rock formation is ______________.
a. discordant
b. dike
c. concordant
d. pluton
[Ques. 9] The anion in the common ionic substance NaHCO3 is
a. CO32-.
b. H+.
c. Na+.
d. HCO3-.
[Ques. 10] Rocks solidified from molten material below ground are classified as ______________ igneous rocks.
a. extrusive
b. intrusive
c. superior
d. inferior
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