Question

A student has an alternative conception that air contracts on heating. Which of the following strategies would you adopt to challenge this alternative conception?

Accepted Answer

Ask the students to attach a deflated balloon to the mouth of a bottle containing air and place the bottle in a water bath containing boiling water and note down the observations.

Answer

Explain the difference between conduction and convection to illustrate that air is a poor conductor of heat.

Answer

Ask students to do an activity which involves filling a plastic bottle to half of its capacity with very hot water, capping tightly and keeping it aside for a few minutes. Ask students to note down the observations.

Answer

Ask students to refer to the textbook for examples from daily life where air expands on heating.

A student has an alternative conception that air contracts on heating. Which of the following strategies would you adopt to challenge this alternative conception?

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