High speed winds and air pressure difference can cause cyclones.They are formed when water vapour changes back to liquid by the release of heat. This heat warms air around and it rises to move up and more air rushes to the vacant place. Thus, a cycle is formed which have low pressure and very high speed of air.

These are produced by the dark clouds which form at fairly low altitude in the atmosphere.

The swift movement of the falling water along with the rising warm air producing sound, lightning, heavy rain and strong wind is called thunderstorm.

The following three precautions must be taken to protect oneself from the lightning of thunderstorm
(i) Do not take shelter under an isolated tree.
(ii) Do not lie on the ground
(iii) Do not take shelter under an umbrella with a metallic end.

I will help my neighbours in case cyclone approaches my village/town by the following ways:
(i) I will help in shifting their household articles, domestic animals, etc., to safer place. (ii) I will provide phone numbers of all emergency services like police, fire brigade and medical centres.
(iii) I will give them safety advice like avoid driving on roads through standing water, not to touch wet switches, etc.

Holes are made in hanging banners and hoardings to allow air to pass through them as a result of which there will be less pressure of air on the banners or hoardings. Unless it is done, these may be uprooted or distorted due to the pressure of the air.

Two methods to find out wind direction at a given place are
(i) An instrument called anemometer can be used to find the direction and speed of the wind.
(ii) Hold a strip of paper outside. The direction in which the paper is blowing is the direction in which the wind blows.

The monsoon winds carry water and it rains. Clouds bring rain and give us happiness. Farmers in our country depend mainly on rains for their harvests. So, monsoon winds are helpful.

Hurricane and typhoon are the other names of cyclone.

B's exhaust fan will expel the hot air more effectively because hot air rises up and her fan is at greater height than A's.

The heat causes air to expand and occupies more space. It becomes lighter. That's why, warm air is lighter than the cold air.

An Indian ocean is mainly responsible to bring rain bearing monsoon winds to Kerala coast in June every year.

Wind currents are generated due to uneven heating on the earth. It may be between equator and pole and between land and water.

Chandigarh is unlikely to be affected by a cyclone because it is not near to the sea or an ocean.

Yes, the following flow chart explains the phenomenon leading to the formation of cloud, rain, storm and cyclone.

In the given figure, the tree line along the sea coast on an island near the equator shows that tree tops are permanently bent in one direction. The reason behind this movement of tree is that during the day time the wind blows from sea to land because land gets warmer more quickly than sea.
This makes the air of land, warm and lighter which is raised up in the sky. Therefore, the top of the bent trees shows the moving direction of wind from sea to land.