The oldest rocks on Earth are between 3.96 and 4.3 billion years old
Indicate whether the statement is true or false
TRUE
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Most of our table salt comes from ________
A) salt obtained by evaporating seawater in dry climates B) salt taken from mines C) China D) combining the metal sodium and the nonmetal chlorine gas in a chemical reaction vessel to make pure NaCl
What is true about the depth of the troposphere?
A. It varies with passing air masses. B. It is shallower over the warm tropics. C. It is deeper in winter. D. It is shallower in summer. E. It is deeper over the cooler poles.
What does the "S" in the mnemonic SLUDGEM stand for?
a. Shortness of breath b. Slurred speech c. Sleepy d. Salivation
Aneroid barometers are so called because:
A) they use aneroids to measure air pressure. B) they measure air pressure without using a liquid. C) they are a hybrid pressure measuring device. D) None of the above. There is no such thing as an "aneroid barometer."