Which statement is most consistent with the scientific method?
A) Hypotheses cannot be revised after they are proposed.
B) Hypotheses are tested through observations and controlled experiments.
C) Scientific laws always arise fully formed and in correlating groups.
D) Theories cannot be modified after they are tested.
B
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On a map with a scale of 1:50,000, a measured distance of 7.5 centimeters represents an actual distance of:
Calculate the following distances using the fractional map scale. ___ kilometers
In a battery, the following two oxidation-reduction reactions are taking place: rxn A: Zn ? Zn+2 + 2e- rxn B: 2 NH4+ + 2e- ? 2 NH3 + H2 Which reaction is taking place at the cathode?
A) rxn A B) rxn B C) Both reactions are happening at both the anode and cathode. D) Both reactions are happening are happening at the electrode. E) The reaction takes place at the electrode, not the cathode.
Surface waves are useful for investigating Earth's interior because they
A) refract at the boundaries between Earth's layers. B) reflect at the boundaries between Earth's layers. C) cast shadows indicating Earth's layers. D) none of the above
Which of the following expresses the values and assumptions of patriarchal ecology?
a. Women’s association with reproduction and the domestic sphere places them closer to nature. b. Men’s association with production and the public sphere distances them from nature. c. Women are associated with fulfilling bodily and emotional needs, while men are associated with rationality, civilization, government, and business. d. All of the above.