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
- Q:-
Which one of the following place is unlikely to be affected by a cyclone.
(i) Chennai (ii) Mangaluru (Mangalore) (iii) Amritsar (iv) Puri
- Q:-
Explain why holes are made in hanging banners and hoardings.
- Q:-
What planning is required in advance to deal with the situation created by a cyclone?
- Q:-
Suggest two methods to find out wind direction at a given place.
- Q:-
How will you help your neighbours in case cyclone approaches your village/town?
- Q:-
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.
Popular Questions of Class 7 Science
- Q:-
State similarities and differences between the laboratory thermometer and the clinical thermometer.
- Q:-
State differences between acids and bases.
- Q:-
Classify the changes involved in the following processes as physical or chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d) Melting of wax
(e) Beating aluminium to make aluminium foil
(f ) Digestion of food - Q:-
Name the elements that determine the weather of a place.
- Q:-
In addition to the rock particles, the soil contains
(i) air and water
(ii) water and plants
(iii) minerals, organic matter, air and water
(iv) water, air and plants - Q:-
Why does an athlete breathe faster and deeper than usual after finishing the race?
- Q:-
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
(iii) Root hairs (c) Transport of food
(iv) Phloem (d) Transport of water
(e) Synthesis of carbohydrates - Q:-
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:-
Classify the following as motion along a straight line, circular or oscillatory motion:
(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?
Recently Viewed Questions of Class 7 Science
- Q:-
What is sludge? Explain how it is treated.
- Q:-
How is clayey soil useful for crops?
- Q:-
Classify the changes involved in the following processes as physical or chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d) Melting of wax
(e) Beating aluminium to make aluminium foil
(f ) Digestion of food - Q:-
State similarities and differences between the laboratory thermometer and the clinical thermometer.
- Q:-
Mark ëTí if the statement is true and ëFí if it is false:
(a) Digestion of starch starts in the stomach. (T/F)
(b) The tongue helps in mixing food with saliva. (T/F)
(c) The gall bladder temporarily stores bile. (T/F)
(d) The ruminants bring back swallowed grass into their mouth and chew it for some time. (T/F) - Q:-
Solve the following crossword puzzle with the clues given:
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.
5. Collective name for layers of soil. - Q:-
Mark ‘T’ if the statement is true and ‘F’ if it is false:
(a) To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. (T/F)
(b) When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. (T/F)
(c) An electromagnet does not attract a piece of iron. (T/F)
(d) An electric bell has an electromagnet. (T/F) - Q:-
What will happen if there are no platelets in the blood?
- Q:-
Fill in the blank:
(a) The insects, butterflies, honeybees and birds help flowering plants in .
(b) A forest is a purifier of and .
(c) Herbs form the layer in the forest .
(d) The decaying leaves and animal droppings in a forest enrich the . - Q:-
Mark ‘T’ if the statement is true and ‘F’ if it is false:
(i) Carbon dioxide is released during photosynthesis. (T/F)
(ii) Plants which synthesise their food themselves are called saprotrophs. (T/F)
(iii) The product of photosynthesis is not a protein. (T/F)
(iv) Solar energy is converted into chemical energy during photosynthesis. (T/F)
- All Chapters Of Class 7 Science
- All Subjects Of Class 7