Class 7 Science - Chapter Winds, Storms and Cyclones NCERT Solutions | Fill the missing word in the blank space
Fill the missing word in the blank spaces in the following statements:
(a) Wind is——————air.
(b) Winds are generated due to —————— heating on the earth.
(c) Near the earth’s surface __________air rises up whereas ___________ air comes down.
(d) Air moves from a region of ——— pressure to a region of ———.
(a) Moving
Wind is moving air. It is produced by the uneven heating of the earth’s surface by the sun. Since the earth’s surface is made of various land and water formations, it absorbs the sun’s radiation unevenly.
(b) Uneven
Winds are generate due to uneven heating on the earth. Winds energy is created by the uneven heating of the Earth’s surface by the Sun. During the day, the air above the land heats faster than air over water. This warm air over the land expands and rises, and the cooler air, which is heavier takes its place, creating wind.
(c) Hot, cold
It is so because warm air is light in weight. So, it rises up whereas cool air comes down.
(d) High, low
Air moves from a region of high pressure to a region of low pressure. The movement of air caused by temperature or pressure differences in wind. Where there are differences of pressure between two places, a pressure gradient exists, across which air moves from the high pressure region to the low pressure region.
More Questions From Class 7 Science - Chapter Winds, Storms and Cyclones
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Which one of the following place is unlikely to be affected by a cyclone.
(i) Chennai (ii) Mangaluru (Mangalore) (iii) Amritsar (iv) Puri
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Explain why holes are made in hanging banners and hoardings.
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What planning is required in advance to deal with the situation created by a cyclone?
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Suggest two methods to find out wind direction at a given place.
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How will you help your neighbours in case cyclone approaches your village/town?
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State two experiences that made you think that air exerts pressure (other than those given in the text).
- Q:-
Which of the statements given below is correct?
(i) In winter the winds flow from the land to the ocean.
(ii) In summer the winds flow from the land towards the ocean.
(iii) A cyclone is formed by a very high-pressure system with very high-speed winds revolving around it.
(iv) The coastline of India is not vulnerable to cyclones. - Q:-
You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer.
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Match structures given in Column I with functions given in Column II.
Column I Column II
(i) Stomata (a) Absorption of water
(ii) Xylem (b) Transpiration
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Fill in the blanks:
(a) Production of new individuals from the vegetative part of parent is called_____________.
(b) A flower may have either male or female reproductive parts. Such a flower is called_____________.
(c) The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as _____________.
(d) The fusion of male and female gametes is termed as _____________.
(e) Seed dispersal takes place by means of _____________, _____________ and _____________. - Q:-
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(i) Motion of your hands while running.
(ii) Motion of a horse pulling a cart on a straight road.
(iii) Motion of a child in a merry-go-round.
(iv) Motion of a child on a see-saw.
(v) Motion of the hammer of an electric bell.
(vi) Motion of a train on a straight bridge. - Q:-
Why do organisms need to take food?
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Fill in the blanks:
(a) Production of new individuals from the vegetative part of parent is called_____________.
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Stainless steel pans are usually provided with copper bottoms. The reason for this could be that
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(b) such pans appear colourful.
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(ii) clayey soil
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Column I Column II
(i) A home for living organisms (a) Large particles
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Across
2. Plantation prevents it.
5. Use should be banned to avoid soil pollution.
6. Type of soil used for making pottery.
7. Living organism in the soil.Down
1. In desert soil erosion occurs through.
3. Clay and loam are suitable for cereals like.
4. This type of soil can hold very little water.
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