Which of the following statement is correct and why Anu We inhale air. Class 7
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Which of the following statement is correct and why Anu We inhale air. Class 7
Which of the following statement is correct and why? Class 7
Anu: We inhale air.
Shanu: We inhale oxygen.
Tanu: We inhale air rich in oxygen.
Answer:
Tanu's statement is correct. We inhale air rich in oxygen. When we inhale, we take in air that contains about 21% oxygen, 78% nitrogen, 0.04% carbon dioxide, other gases and water vapours and exhale air having more carbon dioxide than inhaled air.