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(This picture is taken by a Design Technology student who did the same experiment as the scenario) (which is me. I did this experiment in my DT class last year... therefore no citation!)
 * Scenario:** Scientists want to do the experiment on thermal conductivity of the different materials. (Thermal conductivity is basically talking about the temperature sustainability of the material when it have been heating up for certain periods of time. A box, which is shown in this picture represents a house and different pieces of material are heat up with Quartz halogen light, which is a light powerful light bulb. If the temperature do not really change, the material has high resistance to heat and row sustainability.) They prepared six distinguished materials which are Aluminum, steel, acrylic, polystyrene, plywood, and pine. They are going to use different kinds of data logger to record and analysis the data.

(a) Define the term real time data collection. **(2)** (b) Identify one analogue output device and one digital out put device involved in data logging. **(2)** (c) Explain advantages and disadvantages of the real time data collection. **(6)** (d) Evaluate the analogue device as compared to digital devices. And discuss how they are suitable or not suitable for the scenario. **(10)**
 * Exam Questions**

20 marks question

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