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Moving air and exchanging gases are different - Online practice 1
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Supplied model observation: The diaphragm contracts and moves down; chest volume increases. Breathing (ventilation) moves air; gas exchange transfers individual gases across an exchange surface. A model represents selected features, not every structure. Work from the account without a breathing challenge or practical experiment.
Worksheet preview
- Does this observation mainly illustrate ventilation or gas exchange: 'The diaphragm contracts and moves down; chest volume increases.'?
- Explain how the stated feature supports its function.
- Correct this claim: 'The diaphragm becoming flatter pushes air out.'
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