1. What is atmospheric pressure? How is it defined and what is its average value at sea level? (Pg. 1) Page 76
2. Describe the vertical variation of atmospheric pressure. What is the standard rate of decrease? (Pg. 1) Page 76
3. What is represented by a low-pressure system and a high-pressure system on a weather map? (Pg. 2) Page 77
4. Name and describe the major pressure belts of the world. Are they permanent? (Pg. 2-3) Page 77-78
5. Explain the Pressure Gradient Force. When is it strong or weak? (Pg. 3) Page 78
6. Explain how the Coriolis force affects wind direction in both hemispheres. Why are tropical cyclones not formed near the equator? (Pg. 3-4) Page 78-79
7. Using Table 9.2, describe the pattern of wind direction in cyclones and anticyclones in both hemispheres. (Pg. 4) Page 79
8. Describe the Hadley cell circulation in the tropics. (Pg. 5) Page 80
9. What are land and sea breezes? Explain their formation. (Pg. 6) Page 81
10. What is an air mass? Name the five major source regions and the corresponding air mass types. (Pg. 6) Page 81
11. What are extra-tropical cyclones? Describe their formation and characteristics. (Pg. 7) Page 82
12. List the conditions favourable for the formation and intensification of tropical cyclones. (Pg. 8) Page 83
13. Describe the structure of a mature tropical cyclone, including the eye and eye wall. (Pg. 8) Page 83

What is the primary cause of air motion (wind)? (Pg. 1)

What is the approximate decrease in pressure for every 10m increase in elevation in the lower atmosphere? (Pg. 1)

Near the equator, the sea level pressure zone is known as: (Pg. 2)

What is the combined effect that horizontal winds near the Earth’s surface respond to? (Pg. 3)

The frictional force affecting wind speed is greatest: (Pg. 3)

When isobars are straight and friction is absent, the wind blowing parallel to the isobars is called: (Pg. 4)

Over a low-pressure area at the surface, the air generally: (Pg. 4)

The combined phenomenon of Southern Oscillation and El Nino is known as: (Pg. 5)

During the day, the wind blows from: (Pg. 6)

Which of the following is a warm air mass? (Pg. 6)

Extra-tropical cyclones have a clear: (Pg. 7-8)

What is the calm centre of a mature tropical cyclone called? (Pg. 8)

Thunderstorms are caused by: (Pg. 9)

(Exercise) If the surface air pressure is 1,000 mb, the air pressure at 1 km above the surface will be: (Pg. 9)

(Exercise) The Inter Tropical Convergence Zone normally occurs: (Pg. 9)

(Exercise) The direction of wind around a low pressure in northern hemisphere is: (Pg. 9)

(Exercise) Which one is the source region for the formation of air masses? (Pg. 9)

The instrument used to measure air pressure is a ______. (Pg. 1) Page 76

Lines connecting places having equal pressure are called ______. (Pg. 2) Page 77

The high-pressure areas found along 30° N and 30° S are called ______ highs. (Pg. 2) Page 77

The force exerted by the rotation of the Earth which affects wind direction is the ______ force. (Pg. 3) Page 78

The Coriolis force is maximum at the ______ and absent at the equator. (Pg. 3-4) Page 78-79

The wind circulation around a low-pressure area is called ______ circulation. (Pg. 4) Page 79

The pattern of the movement of the planetary winds is called the ______ of the atmosphere. (Pg. 4) Page 79

The easterlies from either side of the equator converge in the ______. (Pg. 5) Page 80

The cool air draining from high plateaus into valleys is called ______ wind. (Pg. 6) Page 81

The boundary zone where two different air masses meet is called a ______. (Pg. 6) Page 81

Extra-tropical cyclones generally move from ______ to east. (Pg. 8) Page 83

Tropical cyclones in the Indian Ocean are known as ______. (Pg. 8) Page 83

A tornado over the sea is called a ______. (Pg. 9) Page 84

(Exercise) The pressure is measured in units of ______. (Pg. 9) Page 84