Class 7 Science Question Answers - Winds, Storms and Cyclones

Very Short Q & A :

Q1: Moving air is called ____________.

Ans : Wind

Q2: State the cause of generation of wind.

Ans : Winds are generated due to uneven heating on the earth.

Q3: We fill air into a bicycle tube to keep it tight. True/False.

Ans : True

Q4: Increased wind speed is accompanied by reduced _______________________.

Ans : Air pressure

Q5: What is the direction of moving air?

Ans : Region where the air pressure is high to the region where the pressure is low.

Q6: The greater the difference in air the faster the air moves. True/False

Ans : True

Q7: Air ________________on heating.

Ans : Expands

Q8: Warm air is ________________ than the cold air.

Ans : Lighter

Q9: Smoke goes up because______________

Ans : Warm air is lighter and it rises up.

Q10: From where, does the region close to equator get maximum heat?

Ans : From sun.

Q11: Define see breeze.

Ans : On a warm summer day along the coast, the differential heating of land and sea leads to the development of local winds called sea breezes.

Q12: When land breeze does occur in day or in night?

Ans : Night

Q13: What is beau fort scale?

Ans : The Beaufort scale is an empirical measure for the intensity of the weather based mainly on wind power

Q14: Who created beau fort scale?

Ans : The scale was created by the British naval commander Sir Francis Beaufort around 1806.

Q15: The monsoon wind carry ________________ and it rains.

Ans : Water

Q16: Hot, humid tropical areas like India.

Ans : India, Malaysia, Indonesia, Brazil etc.

Q17: A thunderstorm is a storm with lightning and thunder. Its produced by a cumulonimbus cloud, usually producing gusty winds, heavy rain and sometimes hail.

Ans : Penguin, polar bear etc

Q18: Thunderstorms are most likely to happen in the spring and summer months and during the afternoon and evening hours.

Ans : Fur

Q19: Yes, despite their small size, all thunderstorms are dangerous.

Ans : A layer of fat under their skin

Q20: Thunderstorm.

Ans : Thick skin and lot of fat

Q21: Lightning is an electric current. True/False.

Ans : true

Q22: What is hail?

Ans : Hail is created when small water droplets are caught in the updraft of a thunderstorm

Q23: What is a monsoon?

Ans : A monsoon is a seasonal wind, found especially in Asia that reverses direction between summer and winter and often brings heavy rains.

Q24: High speed winds and air pressure difference can cause______________

Ans : Cyclones

Q25: What do you mean by cyclone?

Ans : High speed winds and air pressure difference can cause cyclones.

Q26: How we can monitor cyclones?

Ans : By satellites and radars.

Q27: Which one of the following place is unlikely to be affected by a cyclone.

1. Amritsar
2. Puri
3. Mangaluru
4. Chennai

Ans : Chennai

Q28: In summer the winds flow from the land towards the ocean. True/ False

Ans : False

Q29: The coastline of India is not vulnerable to cyclones. True/ False

Ans : False

Q30: In winter the winds flow from the ____________to the _________.

Ans : Land to the ocean