Uses of Air
Uses of Air
Usefulness of Air:
1. Air is required for respiration: The correct proportions of nitrogen and oxygen are required for our respiration. A normal human being requires about 250 kg to 265 kg of air a day to carry out its normal activities. During respiration, we breathe in oxygen from the air and breathe out carbon dioxide. The inhaled oxygen combines with haemoglobin of our blood to form oxyhaemoglobin. The latter acts as the oxygen-carrier to the cells of our body. In the cell, oxygen oxidizes sugar molecules to produce carbon dioxide and water, and liberates heat energy. We use this energy to perform various works.
2. Air is required for burning of fuels: It is the oxygen of air that is essentially required for burning of things. Nothing will burn in the absence of oxygen. Fuels are mostly mixtures of hydrocarbons (compounds formed from the combination of carbon and hydrogen). When they burn in air, carbon dioxide and water vapour are produced with the release of heat energy.
Fuel + Oxygen Carbon Dioxide + Water Vapour + Energy
3. Plants require air to make their food: Plants require carbon dioxide of the air to make their food by a process called photosynthesis. In photosynthesis, green plants consume carbon dioxide and water vapour from the air and the energy of the sun to prepare sugar (food).
Which of the following is correct : (a) Air is required for respiration. (b) Air helps in the dispersal of seeds. | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct : (a) Plants require carbon dioxide of the air to make their food by a process called respiration. (b) A green house is a glass building used for growing plants that need protection from cold. (c) Plants require carbon dioxide of the air to make their food by a process called photosynthesis. | |||
| Right Option : B | |||
| View Explanation | |||
Consider the following statement about inhaled air and exhaled air.
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| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
