Relatively speaking, the earth's atmosphere is:
A) very thick when compared to the earth's diameter.
B) very thin when compared to the earth's diameter.
C) stops at the top of the troposphere.
D) stops when we reach "space."
Answer: B
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The settling of the soil as water is removed from aquifers causes __________, which causes the surface to lower.
Which of the following statements accurately describes the components of an atom?
a) Protons, which have a positive charge, and neutrons, which have a negative charge, occupy the nucleus. Electrons with no charge orbit the nucleus in shells b) Protons, which have no charge, occupy the nucleus. Positively charged neutrons and negatively charged electrons orbit the nucleus in shells. c) Neutrons, which have no charge, occupy the nucleus. Positively charged protons and negatively charged electrons orbit the nucleus in shells. d) Protons, which have a positive charge, and electrons, which have a negative charge, occupy the nucleus. Neutrons with no charge orbit the nucleus in shells. e) Protons, which have a positive charge, and neutrons, which have no charge, occupy the nucleus. Negatively charged electrons orbit the nucleus in shells.
The three stages involved in the formation of a glacier are the precipitation of
____________________; the formation of ____________________ by partial thawing, refreezing, and crystallization; and compaction and recrystallization to produce ____________________ ____________________. Fill in the blank(s) with the appropriate word(s).
Which of the following minerals is most stable in weathering environments?
a. calcic plagioclase b. olivine c. orthoclase d. pyroxene