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Reasoning
Predicting earthquakes using observable phenomena like phases of the moon, cloud formations, weather conditions or animal behaviour is a controversial and, some would say, impossible task. There is little or no verifiable evidence to link any of these phenomena to predictions of actual seismic activity. Early detection, as a means of advance warning, is far more reliable than future prediction and can be done by measuring primary waves (referred to as P-Waves). These non-destructive waves travel faster through the earth's crust than the harmful and destructive secondary waves and so can provide a valuable, albeit short, advance warning. This effect of different speed waves can be likened to the relationship between light and sound; we see lightning before we hear the thunder. Some people believe that animals can detect P-Waves and that this is what causes them to start behaving strangely. Other theories advanced to explain their behaviour are that that the animals are reacting to changes in low-frequency electromagnetic signals caused by the fracturing of crystalline rock in the fault lines.

162. If animals can detect primary waves, they could be used to predict earthquakes

(a) True
(b) False
(c) Cannot say
(d)

163. Primary waves travel at the speed of sound

(a) True
(b) False
(c) Cannot say
(d)

164. P-Waves, and the low-frequency electromagnetic signals some believe animals can sense, are not the same thing

(a) True
(b) False
(c) Cannot say
(d)

TOTAL

Detailed Solution




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1. Passage Reading 2. Verbal Logic 3. Non Verbal Logic 4. Numerical Logic

5. Data Interpretation 6. Reasoning 7. Analytical Ability 8. Basic Numeracy

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