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1 markTemperature Control and Ventilation

CSEC Integrated Science · May/June 2013 · Paper 2 · Question 4(c)(v)

Figure 7 shows an experiment with five rods of different materials heated in boiling water, each with a thumbtack attached by wax. The order the thumbtacks fall off is C, then A, then D, then B, then E.

Explain why the water is constantly heated throughout the experiment instead of placing the rods in boiling water without a flame.

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Other parts of this question

  1. 4(a)(i)Distinguish among conduction, convection and radiation of heat energy.[3 marks]
  2. 4(a)(ii)Give ONE example of a conductor and ONE example of an insulator.[2 marks]
  3. 4(b)(i)Identify the method of heat transfer from the outside of the pot to the inside of the pot.[1 mark]
  4. 4(b)(ii)Identify the method of heat transfer from the bottom of the water to the top of the water.[1 mark]
  5. 4(c)(i)Suggest an aim for this experiment.[1 mark]
  6. 4(c)(ii)State which rod is the BEST conductor.[1 mark]
  7. 4(c)(iii)State which rod is the BEST insulator.[1 mark]
  8. 4(c)(iv)List TWO variables that must be held constant in this experiment.[2 marks]
  9. 4(d)Workers find the warehouse in Figure 8B much cooler than in Figure 8A. Give a scientific explanation for this observation.[2 marks]

More practice: the rest of this paper · more Temperature Control and Ventilation questions · all CSEC Integrated Science past papers