Which terms best describe East Asia's two climate zones?
a) Mediterranean west and desert east
b) dry interior west and wet (monsoon) east
c) wet (monsoon) west and desert east
d) temperate west and tropical east
Ans: b) dry interior west and wet (monsoon) east
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Over the last 40 or so years, the gap between the world's rich and poor has decreased
Indicate whether this statement is true or false.
Which of the following is a greenhouse gas used as a refrigerant and as a solvent during the manufacture of foam?
A. carbon dioxide B. chlorofluorocarbons C. water vapour D. methane
The charges with sodium chloride are all balanced-for every positive sodium ion there is a corresponding negative chloride ion. Since its charges are balanced, how can sodium chloride be attracted to water, and vice versa?
A) Dispersion forces come into play as the sodium chloride and water come into close proximity. B) Hydrogen bonding in water allows the sodium chloride molecule to be attracted to the water molecule. C) As a water molecule gets close to the sodium chloride it can distinguish the various ions and it is thus attracted to an individual ion by ion-dipole forces. D) This is not a matter of attraction. Sodium chloride dissolves in water because water provides a medium in which the individual sodium and chloride ions can disperse.
Non-silicate minerals are more abundant in the deeper parts of Earth's crust than in the crust as a whole.
Answer the following statement true (T) or false (F)