Since the 1850s researchers have tried to show that variations in seasonal weather are connected in some ways with sunspots
On this basis, some meteorologists predicted that the winter of 1988-1989 in the United States would be severe. However, the winter was a mild one overall, and the meteorologists' attempt to make the connection between the Sun and weather on the Earth appeared unsuccessful, until Barston and Liverzey proposed a hypothesis explaining why the prediction had failed. They argued that the prediction had not taken into account another important element in the climate: the more or less regular pattern of fluctuations in the temperature of the surface waters of the tropical Pacific Ocean.
Barston and Livezey noted that when the water temperature is abnormally high-the phenomenon called EL Nino—the changes of cold winter weather over North American increase. The opposite situation, when surface temperatures are well below normal—La Nina—is far less common. In fact, until late 1988 no one had seen the combination of La Nina, westerly winds in the upper atmosphere, and high solar activity.
Thus, according to Barston and Livezey, La Nina cancelled out the effect of the other two climatic factors and caused the mild winter of 1988-1989. Although this hypothesis is plausible, much research remains to be done before meteorologists can establish and explain the effects of increased solar activity on seasonal weather changes.
Which of the following most accurately describes the organization of
A. A hypothesis is presented, a theory is constructed on the basis of the hypothesis, and then further research to expand the scope of the theory is proposed.
B.A hypothesis is presented, an example that contradicts it is described, and then a hypothesis accounting for the apparent contradiction is proposed.
C. Two opposing hypotheses are stated, and evidence confirming one of the hypotheses is considered.
D. A phenomenon is described, a prediction about that phenomenon is made, and evidence confirming the accuracy of the prediction is presented.
E. A prediction about a phenomenon is detailed and evaluated, and evidence demonstrating the inaccuracy of the prediction is presented.
- Many Runagian senior citizens are no better off financially now than they were before the increase.The phrase “better off” is closest in meaning to________?
- The word "accidental" is closest in meaning to___________ ?
- Who can it be? I’ m quite ____ a loss to guess．
- The number of people flying first class on domestic flights rose sharply in 1990, doubling the increase of the previous year.
- The word "conspicuous" is closest in meaning to______ ?