Available Answers

1. 1.

   What is the effect of increasing and decreasing atmospheric pressure on aeroplanes, as they land and take off or vice versa?

2. 2.

   Why the shifting of the permanent pressure belt is more in the northern hemisphere than in the southern hemisphere?

3. 3.

   Why are the Trade winds named so?

4. 4.

   Fill in the blanks.

   1. The ____________ is an aneroid barometer which records changes in atmospheric pressure continuously on a paper chart.
   2. When the temperature ______________, the air gets cooled, it contracts and descends.
   3. The deflection of winds as a result of the Earth's rotation is called _______________.
   4. The regions around the North Pole and South Pole receive very low _____________ and remain cold throughout the year.
   5. Land and sea breeze are experienced in the _____________ areas.
5. 5.

   Write (T) for true and (F) for false.

   1. Atmospheric pressure is measured in millibars (mb).
   2. When the pressure falls below 760 mm  it is said to be low pressure.
   3. The density and pressure of air decreases with altitude.
   4. The weight of moist air is less than that of dry air.
   5. Chinook is a warm katabtic wind.
6. 6.

   Differentiate between Fortin barometer and Barograph.