Available Answers

1. 1.

   Fill in the blanks:

   1. The atmospheric pressure is measured using an instrument called _____________.
   2. _____________ is the unit used to measure the atmospheric pressure.
   3. The light, warm air rises and creates an area of _____________ pressure.
   4. Atmospheric pressure ___________ with increase in altitude.
   5. The centripetal force is more effective in the __________ areas.
   6. The dense air is _____________ than the thin air.
   7. At sea level, air pressure is about ______________.
2. 2.

   State True (√) or False (X) against the following statements:

   1. Atmospheric pressure increases at higher altitudes.
   2. The lowest atmospheric pressure was recorded at Tosontsengal on December 19, 2001.
   3. As we move upwards, from the Earth's surface, the air becomes lighter.
   4. Air pressure is least at the sea level.
   5. The mountaineers keep oxygen cylinders with them while climbing the mountains, because air becomes thinner on mountains.
   6. The temperature and air pressure are inversely related.
   7. Polar gerions, due to their low temperature conditions, experience low air pressure.
3. 3.

   State True (√) or False (X) against the following statements:

   1. The variation in air pressure is due to the unequal heating of the atmosphere by the Sun.
   2. There are five major pressure belts on the Earth.
   3. The major pressure belts on the Earth are fixed throughout the year.
   4. Equatorial pressure belt is between 5°N and 5°S of the Equator.
   5. Polar High Pressure belt is called the horse latitude.
   6. The sub-polar low pressure belt is also called the circum polar low pressure belt.
   7. Equatorial low pressure belt is also called ITCZ.
   8. Areas of sub-tropical high pressure belt are located between 15°N and 15°S latitudes.
4. 4.

   Fill in the blanks:

   1. The area of polar high pressure belt is situated near the ______________.
   2. Due to high ______________, the air sinks down.
   3. Areas of ____________ pressure belt are located between 30°N to 35°N and 30°S to 35°S latitudes.
   4. ____________ pressure belt is the belt of calms.
   5. The main pressure belts of the Earth shift a little to the north and south along with the apparent movement of the Sun. This phenomenon is called the ____________.
   6. Atmospheric pressure is ______________ on the top of the hills.
5. 5.

   Fill in the blanks:

   1. The vertical movement of air is called _______________.
   2. Wind that moves from the west towards the east is called ______________.
   3. Coriolis force acts to the ____________ of the wind direction in the northern hemisphere.
   4. The winds that blow regularly in a definite direction is certain latitudinal areas of the world are called the ___________ winds.
   5. When the cooler air sinks, it results in an area of ____________ pressure.
6. 6.

   State True (√) or False (X) against the following statements:

   1. The direction of the wind is also affected by the rotation of the earth.
   2. Trade winds are permanent winds.
   3. Westerlies blow in the same direction as the trade winds.
   4. Trade winds are also called "Roaring Forties".
   5. Polar winds are also called polar westerlies.
   6. Westerlies blow from west to east.
   7. In northern hemisphere, polar winds move from north-east towards the south-west direction.
   8. In the southern hemisphere, westerlies are also called "Furious fifties".
   9. Westerlies blow between 30° to 60°N and S latitudes.
   10. Many of the temperate deserts are found on the eastern coast of continents.