A student set up an experiment to measure the rate of oxygen consumption in woodlice. The apparatus included a tube containing soda lime. What is the purpose of the soda lime in this experiment?

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Question

A student set up an experiment to measure the rate of oxygen consumption in woodlice. The apparatus included a tube containing soda lime. What is the purpose of the soda lime in this experiment?

Accepted Answer

To absorb carbon dioxide produced by the woodlice — Award 1 mark for correct answer. Soda lime absorbs CO₂, so any volume change in the apparatus is due to oxygen consumption only. A is incorrect — soda lime absorbs gases, it does not release oxygen. C is incorrect — soda lime is a chemical, not a food source. D is incorrect — soda lime does not regulate temperature.

Answer

To provide a food source for the woodlice

Answer

To maintain a constant temperature

Answer

To absorb carbon dioxide produced by the woodlice

Answer

To release oxygen for the woodlice to breathe

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