When fossil fuels are burned, ________ enter the atmosphere to form acid rain.
A. oxides of nitrogen (NO2) and sulfur (SO2)
B. oxalic acids
C. helium and argon
D. hydrochloric acids
E. hydrogen and bicarbonate ions
Answer: A
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Lightweight Jane and heavyweight Jack wish to parachute at equal terminal velocities. Jack should
A. pull upward on the supporting strands to decrease the downward net force. B. use a larger parachute. C. jump lightly. D. jump first.
Ullman's model of spatial interaction emphasizes three essential conditions. Which of the following is not one of them?
A. complementarity B. intervening opportunities C. gravity D. transferability
Plastic eventually biodegrades
a. True b. False
What desert landscape characteristic would have the most obvious differential weathering and erosion?
A. areas of igneous bedrock B. steep slopes with greater erosion C. areas of metamorphic bedrock D. gentle slopes with faster wind speeds E. areas of sedimentary bedrock