Question

pressure.
2. Suggest two methods to find out wind direction at a given place.
3. State two experiences that made you think that air exerts pressure
(other than those given in the text).
4. You want to buy a house. Would you like to buy a house having windows
but no ventilators? Explain your answer.
5. Explain why holes are made in hanging banners and hoardings.
6. How will you help your neighbours in case cyclone approaches your
village/town?
7. What planning is required in advance to deal with the situation created
by a cyclone?
8. Which one of the following place is unlikely to be affected by a cyclone.
(i) Chennai
Mangaluru (Mangalore)​

Answer 1

Answer:

1.  (i) An instrument called anemometer can be used to findthe direction and speed of the wind. (ii) Hold a strip of paper outside. Thedirection in which the paper is blowing, is the direction in which the wind blows.
2. Two experiences that made usthink that air exerts pressure are (i) Cycling against the direction of the wind, it is difficult to ride
3. is not a good idea to buy a house without ventilators because warm air is lighter than cold air hence warm air passes out of your home through ventilators.
4. Holes are made in hanging banners and hoardings so that air can pass through them easily and to reduce the air pressure. If banners and hoardings do not have holes, pressure exerted by wind may tear them off, loosen them or make them fall.
5. (i) I will help in, shifting their household articles, domestic animals, etc to safe place. (ii) I will provide phone numbers of all emergency services like police, fire brigade and medical centres.
6. Facilities forcyclone prediction and forecasting which can give cyclone warning in advance. Quick information and communication linkages so that information can be spread quickly.
7. chennai

Answer 2

Answer:

A house having windows but no ventilators should not be bought. This is because warm air is lighter than cold air and therefore, it goes up. This warm air can go outside the house mostly through ventilators. If there are no ventilators, then the warm air cannot go outside easily.