Wearing more number of clothes makes air gap which do not allow heat to pass out but in case of one thick cloth it is not as such, so we should wear more layers of clothing during winter to keep us warmer.

Examples of conductors are metal and steel and examples of insulators are wood and plastic.

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.

Two experiences that made us think that air exerts pressure are
(i) Cycling against the direction of the wind, it is difficult to ride. It shows that the air exerts pressure.
(ii) While rowing a sailboat in the direction of the wind, it is always easier to row and while rowing a sailboat against the direction of the wind, it is very difficult to row. It also shows that the air exerts pressure.

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.

As heat can only flow from higher temperature to lower temperature. Thus, the heat will not flow from iron ball to water or vice-versa.

A clinical thermometer consists of a long narrow, uniform glass tube. It has a bulb at one end which contains shining liquid mercury. Outside the bulb a small thread can be seen in which mercury can flow. It has scale marked from 35°C to 42°C.

Temperature is the degree of hotness and coldness of a body. The SI unit of temperature is Kelvin (K). It is a measure of heat energy. Thermometer is a reliable device to measure temperature of a body.

Gunny bags have a number of fine pores filled with air. Air being a bad conductor of heat does not allow heat from outside to go to the ice and melt it.

Materials which do not allow heat to pass through them easily are poor conductors of heat and are called insulators. e.g., wood, plastic.

Thunderstorm is caused by violent air currents inside the cumulus (thunder) clouds. The thunderstorms are accompanied by heavy rains and high speed winds, which can damage weak buildings, uproot trees, submerge crops and can cause flash floods. This on the whole causes a lot of economic loss and misery to humans.

Cyclones can be very destructive as they travel over seas at 15-30 km/h and the strong winds push water towards the shore even when the storm is hundreds of kilometres away. This is actually the first indication of an approaching cyclone. The central low pressure area lifts the water surface in the centre to a height of 3 - 12 metres and it appears like a water wall moving towards the shore. As a result seawater enters and floods the low lying coastal areas causing loss of life and property. This reduces the fertility of the soils also. Since cyclones are accompanied by heavy rainfall, it further worsens the flood situation. In addition, the communication system, livestock, trees, buildings, bridges and many other man-made structures are also damaged by high speed wind.