"Weather" and "climate" are ________
A) synonyms
B) differentiated because climate studies the stratosphere
C) both atmospheric studies based on many decades of data
D) differentiated because climate studies the long-term
E) differentiated because weather is not covered in your textbook
Answer: D
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Increasing levels of greenhouse gases have caused a
A) rise in ocean temperatures but a decrease in ocean pH. B) rise in ocean temperatures and an increase in ocean pH. C) decrease in ocean temperatures and a decrease in ocean pH. D) decrease in ocean temperatures but an increase in ocean pH.
Which of the following is a result of clearing forests for agricultural purposes?
A) Biodiversity is increased because croplands attract insect pests and birds. B) Water runoff is decreased because croplands tend to absorb more water than forests. C) Crop productivity is greatly increased because of the rich soil. D) Soil erosion is increased because deforestation and tilling remove the vegetative cover.
Continuing decline of pollinator populations, such as honeybees, could cause a serious disruption of food production for humans.
Answer the following statement true (T) or false (F)
Diethyl ether can be made from ethanol. The reaction is: 2 C2H5OH(l) ? (C2H5)2O(l) + H2O(l) The percent yield of diethyl ether in one experiment was 94.0% and actual yield was 68.6 g. How much ethanol did the chemist use in this experiment?
A) 45.4 g B) 73.0 g C) 80.2 g D) 90.7 g