Air Around Us: Class 6 Science Q&A
25 free answers on Air Around Us (Science) for Class 6 students, across CBSE, ICSE and State boards. Includes questions such as “How do plants and animals help each other in the exchange of gases in the atmosphere?”, “List five activities that are possible due to the presence of air.”, “The component of air used by green plants to make their food is ___________.”
Question & Answer
Questions
- ScienceClass 6CBSE
On a Sunday morning Paheli’s friend visited her home. She wanted to see some flowering plants in the nearby garden. Both of them went to the garden. While returning from the garden they also observed some flowering plants on the road side. But to their surprise they found that the leaves and flowers of these roadside plants were comparatively very dull. Can you help them to know why?
The dull appearance of the leaves and flowers of the roadside plants may be due to the air quality present in the open area which includes dust particles emitted from the vehicles, chimneys and factories. These dust particles stick to the plant parts which made them appear dull.
- ScienceClass 6CBSE
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature. (a) Why did the tiny bubbles appeared? (b) Do you think tiny bubbles will appear on heating the water taken out from the bottle? Justify your answer.
Solution: The tiny bubbles appeared before the water started to boil since the air dissolved in water. Once the water started to boil, the air dissolved in water escaped in the form of Paheli had boiled the water completely where the air from the water had escaped out, so on reheating the cooled boiled water will not make any tiny bubbles as there is no air present in it.
- ScienceClass 6CBSE
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere. (a) Oxygen (b) Nitrogen Carbon dioxide
Solution: If oxygen gas disappears from the atmosphere, life becomes impossible on earth since oxygen is very essential for the survival of the living Animals and plants take in oxygen from the atmosphere and release carbon dioxide during respiration. It becomes impossible for living organisms to breathe in the absence of oxygen and hence, eventually the organisms will die so oxygen is very necessary. Nitrogen constitutes major part of
- ScienceClass 6CBSE
Explain the following observations very briefly. (a) A firki does not rotate in a closed area. (b) The arrow of weather cock points towards a particular direction at a particular moment. (c) An empty glass in fact is not empty. Breathing through mouth may harm you.
Solution: In a closed area, there is a lack of air movement which does not support the rotation of a firki. A firki usually rotates when placed in an open area due to the moving air present all around. A weather cock is an instrument used to indicate the direction of the It consists of an arrow, mounted at its centre of gravity for it to move freely about a vertical axis. Hence, the arrow points towards a particular dire
- ScienceClass 6CBSE
Match the items of column I with the items of column II. Column I Column II (a) Weather cock (i) Gases and fine dust particles (b) Mountaineers (ii) Sailing yacht (c) Fine hair inside the nose (iii) Oxygen cylinders (d) Smoke (iv) Direction of air flow (e) Wind (v) Prevent dust particles
Solution: Here is the correct match: Column I Column II (a) Weather cock (iv) Direction of air flow (b) Mountaineers (iii) Oxygen cylinders (c) Fine hair inside the nose</
- ScienceClass 6CBSE
Garima observed that when she left her tightly capped bottle full of water in open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it happened?
Solution: When air gets dissolved in water it escapes in the form of tiny bubbles due to heat from the sun. Hence, tiny bubbles were formed all around inside the bottle.
- ScienceClass 6CBSE
1. A list of words is given in a box. Use appropriate words to fill up the blanks in the following statements. [Air, oxygen, wind, water vapour, mixture, combination, direction, road, bottles, cylinders] (a) The makes the windmill rotate. (b) Air is a of some gases. (c) A weather cock shows the in which the air is moving at that place. Mountaineers carry oxygen with them, while climbing high mountains.
Solution: wind mixture direction cylinders
- ScienceClass 6CBSE
1. In a number of musical instruments, air plays an important role. Can you name such instruments?
Solution: Air plays an important role in a number of musical instruments such as mouth organ, harmonium, shehnai, trumpet, trumpet and flute.
- ScienceClass 6CBSE
1. Make sentences using the given set of words. (a) 99%, oxygen, nitrogen, air, together (b) Respiration, dissolved, animals, air, aquatic Air, wind, motion, called
Solution: 99% of the air is made up of Oxygen and nitrogen Aquatic animals use dissolved air for Air in motion is called
- ScienceClass 6CBSE
Usha took a lump of dry soil in a glass and added water to it till it was completely immersed. She observed bubbles coming out. The bubbles contain (a) water vapour (b) only oxygen gas (c) air none of these.
Solution: (c): air When the water is poured on the lump of soil, the soil absorbs the water in the form of bubbles.
- ScienceClass 6CBSE
The components of air which are harmful to living beings are (a) nitrogen and carbon dioxide (b) dust and water vapour (c) dust and smoke smoke and water vapour.
Solution: (c): dust and smoke Water vapour is important for the water cycle in nature. Nitrogen is necessary for plants. Carbon dioxide is essential for photosynthesis. Hence, dust particles and smoke coming out from factories are very harmful for living beings.
- ScienceClass 6CBSE
Which of the following components of air is present in the largest amount in the atmosphere? (a) Nitrogen (b) Oxygen (c) Water vapour Carbon dioxide
Solution: : Nitrogen Atmosphere contains nitrogen in the largest amount. It mainly constitutes 78% of nitrogen, 21% of oxygen and remaining 1% is formed by carbon dioxide, water vapour, few other gases and dust particles.
- ScienceClass 6CBSE
1. Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations. (i) Bubbles of air came out from the bottle. (ii) Some water entered the bottle. (iii) Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water. (iv) No bubbles formed, only water entered the bottle. Which observations is / are correct? (a) (i) and (ii) (b) (iv) only (c) (iii) and (iv) (i) only
Solution: : (i) and (ii) Bubbles of air came out from the bottle. Some water entered the bottle.
- ScienceClass 6CBSE
Mountaineers carry oxygen cylinders with them because (a) there is no oxygen on high mountains (b) there is deficiency of oxygen on mountains at high altitude (c) oxygen is used for cooking oxygen keeps them warm at low temperature.
Solution: (b): there is deficiency of oxygen on mountains at high altitude As higher we go, the atmosphere gets thinner and the supply of oxygen is reduced. This makes difficulty in breathing on hill stations and mountains. Therefore, while climbing high mountains, mountaineers carry oxygen cylinders with them.
- ScienceClass 6CBSE
What is not true about air? (a) It makes the windmill rotate. (b) It helps in the movements of aeroplanes. (c) Birds can fly due to presence of air. It has no role in water cycle.
Solution: (d): It has no role in water cycle. Air plays a major role in water cycle. Water vapours are risen up to form clouds.
- ScienceClass 6CBSE
Wind does not help in the movement of which of the following? (a) Firki (b) Weathercock (c) Ceiling fan Sailing yacht
Solution: (c): Ceiling fan Wind does not help in the movement of ceiling fan since ceiling fan moves by electricity.
- ScienceClass 6CBSE
Which of the following statements is incorrect? (a) All living things require air to breathe. (b) We can feel air but we cannot see it. (c) Moving air makes it possible to fly a kite. Air is present everywhere but not in soil.
Solution: (d): Air is present everywhere but not in soil. Air is omnipresent in nature and is present everywhere including soil. This can be proved by a simple activity. By taking a lump of dry soil in a beaker or a glass, add water to the soil, we can see that the soil has absorbed the water in the form of bubbles.
- ScienceClass 6CBSE
How do plants and animals help each other in the exchange of gases in the atmosphere?
Solution: During the process of respiration, animals and plants consume oxygen from the air and release carbon dioxide gas into the air. Besides, green plants also release oxygen gas by utilising carbon dioxide during the process of photosynthesis. Hence, in this way, plants and animals help each other in the exchange of gases in the atmosphere.
- ScienceClass 6CBSE
List five activities that are possible due to the presence of air.
Solution: The five activities that are possible due to air are as follows: Photosynthesis Cloud formation Respiration Transpiration Winnowing
- ScienceClass 6CBSE
The component of air used by green plants to make their food is ___________.
Solution: The component of air used by green plants to make their food is carbon dioxide.