Additional Questions With Solutions
Ques: What is wind ?
Ans:The moving air is called the wind.
Ques: Which air is lighter? Warm air or cold air.
Ans:Warm air is lighter.
Ques: Why does smoke go up?
Ans: Smoke is warm, by which it is lighter so it goes up.
Ques: How do monsoon winds carry water and its rain?
Ans: Ocean airs are hot and mixed with land air they become hotter which cause rain.
Ques: What is thunderstorm?
Ans: The swift movement of the falling water droplets along with the rising air create lightning and sound. It is this event that we call a thunderstorm.
Ques: What is “Hurricane” or “Typhoon”.
Ans: A cyclone is known by different names in different parts of the world. It is called a ‘hurricane’ in the American continent. In Philippines and Japan it is called a ‘typhoon’.
Ques: What technologies are used to monitor cyclone?
Ans: Monitoring cyclones with the help of advance technology like satellites and radars.
Ques: What is caused cyclone?
Ans: High-speed winds and air pressure difference can cause cyclones.
Ques: Write two properties of wind.
Ans:
- It always moves.
- Winds carrying water vapour bring rain.
- Air moves from the region where the air pressure is high to the region where the pressure is low.
Ques: What are monsoon winds?
Ans: The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land. These are monsoon winds.
Ques: What factors are responsible for cyclones?
Ans: Factors like wind speed, wind direction, temperature and humidity are responsible for cyclone.
Ques: Suggest two methods to find out wind direction at a given place.
Ans:
- Seeing the direction of flying a left dry leaf.
- By wind direction indicator.
Ques: State two experiences that made you think that air exerts pressure (other than those given in the text).
- After filling the air the balloon blown.
- Moving of curtain and door.
Ans:
Ques: You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer.
Ans: No. because the ventilator provide path to excrete hot air from the room. They prevents house by strong wind like storm.
Ques: Explain why holes are made in hanging banners and hoardings.
Ans: The air puts pressure on the banner but through the holes air passes easily without any damages.
Ques: How will you help your neighbours in case cyclone approaches your Village/town?
Ans:
- Alerting against the coming dangers
- Searching for shelter.
- Keeping storage of water and food.
- Setting up first aid facility.
Ques: What planning is required in advance to deal with the situation created by a cyclone?
Ans:
- Setting up cyclone warning system.
- Setting up food and water storage.
- Setting up first aid facility.
Ques: Why are wind currents generated?
Ans: Wind currents are generated due to;
- Uneven heating between the equator and the poles.
- Uneven heating of land and water.
Ques: What does monsoon wind carry?
Ans: water
Ques: Where do thunderstorms develop mostly?
Ans: Thunderstorms develop in hot, humid tropical areas like india very frequently.
