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Miracle Learning Centre Primary Science Tuition Question on Energy. (PSLE Science Tuition)

2. Roger set up the experiment below with an iron rod and a glass rod of the same size. He used two retort stands to secure the rods. He then used some wax to attach four pins, A, B, C and D at equal distance apart from the burner.

Roger turned on the burner to heat up the rods at the centre marked X. (a) Which pin(s) will drop after 10 minutes of heating? Explain your answer.

(b) Write down the order in which the pins will drop during the heating process.

(c) From the observation of the experiment above, which type of spoon, metal or porcelain when placed in a cup of hot coffee will help it to cool faster? Explain your answer.

Miracle Learning Centre Answer to Primary Science Tuition Question on Energy. (PSLE Science Tuition) Answer: a) All the pins as heat travels through all things. After 10 minutes the glass part of the rod will get heated up too. b) B, A, C, D c) The metal spoon. It would absorb the heat faster as it is a good conductor of heat where the porcelain spoon is a poor conductor of heat, thus it takes a longer time to absorb the heat.

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