Thunderstorms

Q.

Why do we see lightning first and then after a moment we hear the thunder?

1. Because lightning occurs first.

2. Because it is too far away from us.

3. Because light travels much faster than sound.

4. None of these.

Q. Which of these is the reason why the thatched roofs of huts are blown off during high winds?

1. High speed winds decreases the pressure above the roof
2. High speed winds makes the pressure difference zero between the above and below of the roof
3. None of these
4. High speed winds increase the pressure above the roof

Q.

Prove that high speed winds reduce air pressure.

Q.

Why do roofs of houses made of tin get blown off by high speed winds

Q. During a thunderstorm, the sound of a thunder is heard after the lightning is seen. Why?

Q.

What are the basic ingredient(s) for the formation of a thunderstorm?

1. moisture

2. variation in air temperature

3. lift

4. moon

Q.

Lightning is an example of___.

1. charging by conduction

2. static charging

3. charging by induction

4. static discharge

Q. Two methods to find wind direction

Q. What precautions should be taken during storms?

Q. What would happen if high-speed winds blew over the roofs of buildings?

Q.

Explain how Lightning occur in terms of the charges produced by rubbing. [5 MARKS]

Q. A storm with thunder and lightning and typically accompanied by heavy rain or hail. Identify the phenomenon.

1. Tsunami
2. Thunderstorm
3. Earthquake
4. Flood

Q. During a cyclone, high-speed wind blows the roof of a building because it creates a above the roof.

1. low pressure
2. high pressure
3. high temperature

Q.

In sky, lightning and thunders occur at same time.

1. True

2. False

Q. Select the correct statement regarding lightning.

1. Lightning is not a form of energy.
2. During lightning, no current flows through the atmosphere.
3. It is a sudden electrostatic discharge between the electrically charged regions of the cloud.
4. It is a sudden electrostatic discharge between the chargeless regions of the cloud.

Q. Thunderstorm develops very frequently in areas having

1. Polar climate
2. Tropical climate
3. Desert climate
4. Temperate climate

Q. During a thunderstorm, the sound of a thunder is heard after the lightning is seen. Why?

Q. During thunderstorm lightning is seen first and thunder is heard later on. Why?

1. Light travels faster than sound
2. First light and then sound is produced
3. Sound travels faster than light
4. Sound becomes feeble due to strom

Q. A thunderstorm is accompanied by :

1. Lightning
2. Cyclone
3. Hurricane
4. Earthquake

Q.

Explain the phenomenon of lightning.

Q.

Question 13
Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightning is seen earlier and thunder is heard later. Can you explain?

Q. Why do you think that the cable connection in the house becomes dangerous during lightning?

Q. Select the correct statement(s) regarding lightning.

1. During lightning, high current flows through the atmosphere.
2. During lightning, no current flows through the atmosphere.
3. It is a sudden electrostatic discharge between the electrically charged regions of the cloud.
4. It is a sudden electrostatic discharge between the chargeless regions of the cloud.

Q. Why is it advisable not to shut all the doors and windows during a storm?
[2 marks]
[Exemplar]
[Air pressure]

Q. A thunderstorm is an event characterised by the presence of lightning and sound.

1. True
2. False

Q. Which of the following is not correct about thunderstorms?

1. They develop in hot, humid tropical areas like India very frequently.
2. They develop in cold, humid areas like polar region very frequently.
3. The swift movement of falling water droplets along with rising air create lightning and sound.
4. Upward rising winds produced by rising temperatures carry water droplets upwards.

Q. Choose the appropriate synonym of the underlined word:
We were really overwhelmed by your kindness.

1. blown up
2. blown away
3. none of the above
4. blowdown

Q. Why do high speed winds often lift off roofs of houses with tin or thatch roofs?

Q.

What is the lighting? How is it caused?

Q. Garima was returning to home from office. Suddenly she saw thunderstorms happening around. She called Sushweta to take advice from her on what she should do. Which of the following(s) should be the advice(s) given by Sushweta?

1. Take shelter under an umbrella having metallic end
2. Get out of water logged areas
3. Take shelter under metallic shades
4. None of these