Discussion
Read the following statements :
A. The areas bounded by the Tropic of Cancer and the Arctic Circle have moderate temperatures.
R. The mid-day sun never shines overhead on any latitude beyond the Tropic of Cancer.
Choose the correct option.
Answer: B
The keyed answer is Both A and R are true but R is not the correct explanation of A.
A is true: the area between the Tropic of Cancer and the Arctic Circle (and its southern counterpart) is the temperate zone, with moderate temperatures. R is also true: the mid-day sun is directly overhead only between the two tropics, so it never shines overhead on any latitude beyond the Tropic of Cancer.
The key does not accept R as the explanation because R is equally true of the frigid zone beyond the Arctic Circle, which is extremely cold, not moderate. What makes the temperate zone moderate is that the sun's rays there fall at an intermediate angle, more slanting than in the tropics but less than near the poles; R on its own does not say that. The options calling A or R false are wrong, since both statements are accurate.
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