The aneroid barometer
A) is more accurate than a mercury barometer.
B) is larger than a mercury barometer.
C) consists of a flexible metal cell that is open to the air.
D) is called an altimeter in an airplane.
E) all of the above
D
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The current trend in China is that people are leaving big cities for a higher quality of life in rural areas.
Answer the following statement true (T) or false (F)
Harry Hess suggested which of the following?
A) Guyots formed at deep depths and migrated to shallow water. B) The continents plowed through oceanic lithosphere on their own power. C) The oceans are much older than the continents. D) The volcanic mid-ocean ridges were formed due to sea floor spreading.
What happens when dissolution occurs between halite and water?
A) Halite crystals break into sodium and calcium ions, which exist invisibly between water molecules. B) Halite crystals disappear and only water molecules end up being present. C) Water molecules break into hydrogen and oxygen ions, which exist invisibly between halite crystals. D) Water molecules disappear and only halite crystals end up being present.
The formation of polyethylene is an example of which of the following?
A) chain-growth polymerization B) oxidative polymerization C) step-growth polymerization D) none of these