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  1. Asked: November 24, 2020In: Class 7 Science

    The mountaineers carry oxygen with them because:

    Badrinath
    Added an answer on November 24, 2020 at 5:54 am

    (b) The amount of air available to a person is less than that available on the ground. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

    (b) The amount of air available to a person is less than that available on the ground.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

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  2. Asked: November 24, 2020In: Class 7 Science

    During heavy exercise, we get cramps in the legs due to the accumulation of

    Badrinath
    Added an answer on November 24, 2020 at 5:54 am

    During heavy exercise, we get cramps in the legs due to the accumulation of (ii) lactic acid. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

    During heavy exercise, we get cramps in the legs due to the accumulation of (ii) lactic acid.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

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  3. Asked: November 24, 2020In: Class 7 Science

    During exhalation, the ribs

    Badrinath
    Added an answer on November 24, 2020 at 5:52 am

    During exhalation, the ribs (ii) move downwards. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

    During exhalation, the ribs (ii) move downwards.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

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  4. Asked: November 24, 2020In: Class 7 Science

    Normal range of breathing rate per minute in an average adult person at rest is:

    Badrinath
    Added an answer on November 24, 2020 at 5:51 am

    Normal range of breathing rate per minute in an average adult person at rest is (ii) 15–18. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

    Normal range of breathing rate per minute in an average adult person at rest is (ii) 15–18.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

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  5. Asked: November 24, 2020In: Class 7 Science

    In cockroaches, air enters the body through

    Badrinath
    Added an answer on November 24, 2020 at 5:50 am

    In cockroaches, air enters the body through (iii) spiracles. In cockroaches, air enters the body through (iii) spiracles.

    In cockroaches, air enters the body through (iii) spiracles.

    In cockroaches, air enters the body through (iii) spiracles.

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  6. Asked: November 24, 2020In: Class 7 Science

    Take three test-tubes. Fill each of each with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of CO₂?

    Badrinath
    Added an answer on November 24, 2020 at 5:50 am

    Living organisms release CO2 during respiration whereas plant utilize CO2 for photosynthesis. So, the test tube A will have the highest concentration of carbon dioxide because the carbon dioxide as it comes only by respiration of snail. In test tubes B and C, a part of the carbon dioxide is utilizedRead more

    Living organisms release CO2 during respiration whereas plant utilize CO2 for photosynthesis. So, the test tube A will have the highest concentration of carbon dioxide because the carbon dioxide as it comes only by respiration of snail. In test tubes B and C, a part of the carbon dioxide is utilized by the plant for photosynthesis and hence there is less concentration of carbon dioxide.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

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  7. Asked: November 24, 2020In: Class 7 Science

    Why do we often sneeze when we inhale a lot of dust-laden air?

    Best Answer
    Badrinath
    Added an answer on November 24, 2020 at 5:49 am

    When dust particles enter our nostril, it triggers a message to the brain. The brain instructs the nasal chamber to initiate sneezing. This is a method to remove the unwanted dust particles from the nostrils. Sneezing is a type of defence mechanism used by our body. https://www.tiwariacademy.com/nceRead more

    When dust particles enter our nostril, it triggers a message to the brain. The brain instructs the nasal chamber to initiate sneezing. This is a method to remove the unwanted dust particles from the nostrils. Sneezing is a type of defence mechanism used by our body.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

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  8. Asked: November 24, 2020In: Class 7 Science

    List the similarities and differences between aerobic and anaerobic respiration.

    Badrinath
    Added an answer on November 24, 2020 at 5:48 am

    • Similarities: Food is oxidized in both cases and energy is released. • Differences: Carbon dioxide and water are the end products of aerobic respiration, while alcohol is the end product of anaerobic respiration. Aerobic respiration releases more energy than anaerobic respiration. https://www.tiwaRead more

    • Similarities: Food is oxidized in both cases and energy is released.
    • Differences: Carbon dioxide and water are the end products of aerobic respiration, while alcohol is the end product of anaerobic respiration. Aerobic respiration releases more energy than anaerobic respiration.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

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  9. Asked: November 24, 2020In: Class 7 Science

    Why does an athlete breathe faster and deeper than usual after finishing the race?

    Best Answer
    Badrinath
    Added an answer on November 24, 2020 at 5:47 am

    When the athlete runs in the race, his body needs more energy. In order to get extra energy, the athlete breathes faster. Because more oxygen is supplied to our cells. It speeds up the breakdown of food and more energy is released. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapteRead more

    When the athlete runs in the race, his body needs more energy. In order to get extra energy, the athlete breathes faster. Because more oxygen is supplied to our cells. It speeds up the breakdown of food and more energy is released.

    https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-10/

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  10. Asked: November 24, 2020In: CBSE

    What would be the CBSE Exam 2022-2023 Date Sheet for Class 10 and 12?

    Badrinath
    Added an answer on November 24, 2020 at 5:35 am

    start from May

    start from May

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