Class VII

Equator is a region of _ pressure while poles are regions of _ pressure . 
  1. high, low 
  2. low, high 
  3. low, low 
  4. high, high 
Wind mill is used to
  1. Produce high speed wind
  2. Generate electricity
  3. Measure wind direction
  4. Measure wind speed
When wind speed increases, air pressures 
  1. Increases 
  2. Decreases 
  3. Remains constant 
  4. None of these 
Which one of the following statement is INCORRECT ? 
  1. When air gets heated, it expands . 
  2. When air gets cooled, it contracts . 
  3. The warm air is heavier than cold air . 
  4. Air moves from high pressure region to low pressure region . 
Which one of the following is NOT recommended during Lightening or thunderstorm ? 
  1. Take Shelter in a bus or car . 
  2. In a forest, seek shelter in a low area under a thick growth of small trees . 
  3. Take shelter under isolated tree . 
  4. Get away from tractors and other metal farm equipment . 
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