Oxygen Cycle
Oxygen Cycle
Concentration of oxygen in air: The concentration of oxygen in the atmosphere is about 21%. It is one of the constituents of water. Oxygen is cycled in the living world through respiration and photosynthesis. All living organisms take in oxygen for respiration. During this process food is oxidized, energy is produced and carbon dioxide is released into the atmosphere. Carbon dioxide is used by green plants to produce food materials during photosynthesis. Oxygen is released in this process as a by-product. Some of the oxygen also gets incorporated into the food materials.
Oxygen cycle: Oxygen is also cycled during burning and combustion. Oxygen is consumed in the burning of materials and carbon dioxide is released during this process. Oxygen combines with nitrogen and forms nitrogen oxides, amino acids, proteins, etc. These compounds release oxygen in the atmosphere when they are broken down. Thus, the oxygen level is balanced in the environment.
Which of the following are correct : (a) Oxygen gets removed from the air during respiration and burning. (b) Oxygen is consumed in the burning of materials and carbon dioxide is released during this process. (c) Oxygen combines with nitrogen and forms nitrogen oxides, amino acids, proteins, etc. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct : (a) Plant produce oxygen during Photosynthesis. (b) Utilize oxygen during Respiration (c) Oxygen is utilized during combustion. | |||
| Right Option : D | |||
| View Explanation | |||
Balance of oxygen and carbon dioxide in air is maintained by ________________________________ | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thAbhyas 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
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
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Hiya Gupta
8thAbhyas 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
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Barkha Arora
10thIt 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
10thMy 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.
Shivam Rana
7thMy 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
8thAbout 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.
