1. © KCL/PENTECH/WCED 2000 Day length Measuring temperature A home made thermometer is made from: - a test tube that is 10 cm long and with an inside diameter of 1.5 cm; - into the test tube is inserted a rubber stopper with a hole in it; - the stopper has a diameter of 1.5 cm and is 2 cm long; - a narrow glass tube 20 cm long is pushed through the hole in the stopper; - this glass tube goes half way down the test tube. The test tube and narrow glass tube have red water in them. The red water only comes half-way up the narrow tube. DRAW the homemade thermometer to scale. 1.

2. © KCL/PENTECH/WCED 2000 Day length Measuring temperature

3. © KCL/PENTECH/WCED 2000 Day length Measuring temperature 3. -10 110 100 80 60 40 20 0 10 30 50 70 90 TAKE READINGS from the thermometer and watch and put them into the table below. Time of day Temperature in degrees Celsius -10 110 100 80 60 40 20 0 10 30 50 70 90 -10 110 100 80 60 40 20 0 10 30 50 70 90 -10 110 100 80 60 40 20 0 10 30 50 70 90 -10 110 100 80 60 40 20 0 10 30 50 70 90 -10 110 100 80 60 40 20 0 10 30 50 70 90 In this experiment temperature is being measured at different times of day.

4. © KCL/PENTECH/WCED 2000 Day length Measuring temperature 4. A thermometer was put in a room in a house with a metal roof. Temperatures were taken every two hours, for one day The temperatures at different times are shown in the table below. PLOT a bar chart of the results on the graph paper provided below. Time of day morningafternoon/evening 12 10 8 4 2 6 2 4 6 8 12 temperature in degrees Celsius 2830 28 268 15 23910 26 1814 time of day 246 8 10122 4 6 8 1012 30 20 10 0 Temperature in degrees Celsius Time of day morningafternoon PREDICT the pattern of temperature change during one day in the winter by adding to your bar chart.

5. © KCL/PENTECH/WCED 2000 Day length Measuring temperature 5. 1224 6 8 10 12246810 20 30 Temperature in degrees Celsius time of day house with thatched roof DESCRIBE in your own words what the bar chart shows. house with metal roof The temperature changes in two different houses are compared in this graph. One house has a thatched roof the other has a metal roof. morning afternoon

6. © KCL/PENTECH/WCED 2000 Day length Measuring temperature 6. Thabiso thought that a room on the East side of his house was hotter than a room on the West side. Design an experiment over a 24 hour period to find out if he was correct. LIST the apparatus you need LIST the variables you will measure HYPOTHESISE the results do you expect? - during the morning - during the afternoon - during the evening Do you think Thabiso was correct? GIVE YOUR REASONS.