This document consists of 7 printed pages and 1 blank page.
SP (SLM/CGW) T26711/3
© UCLES 2007
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
General Certificate of Education Ordinary Level
READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all work you hand in.
Write in dark blue or black pen.
You may use a pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, highlighters, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
Answer both questions.
At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part question.
Paper 3 Practical Test
1 hour 15 minutes
Candidates answer on the Question Paper.
As specified in the Confidential Instructions.
For Examiner’s Use
© UCLES 2007
1 The human body maintains a constant temperature regardless of the external temperature
even though heat may be transferred to or from the environment.
Fig. 1.1 shows the apparatus you will use to investigate heat transfer.
small plastic bottle
The small plastic bottle represents the human body.
The water in the beaker represents the external environment.
Read through the following instructions before you attempt question (a)(i).
Half fill the plastic bottle with water at approximately 37 °C (supplied by your
Measure the temperature of the water in the plastic bottle and record it in the table you
have prepared below.
Immediately place the plastic bottle in the beaker of ice-cold water.
Then measure the temperature of the water in the bottle every minute for five minutes
and record your measurements.
Between readings, gently move the bottle around in the beaker.
Replace the water in the plastic bottle with water at 37 °C and replace the water in the