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Practical Work for Learning

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Presentation on theme: "Practical Work for Learning"— Presentation transcript:

1 Practical Work for Learning
Melting ice

2 Learning outcomes work in small groups to generate and evaluate scientific arguments present a scientific argument using oral and visual methods. describe how energy is transferred through a solid conductor from higher to lower temperature apply ideas about energy transfer by thermal conduction in unfamiliar situations.

3 Comparing the two blocks:
plastic and metal Similarities Differences

4 Predict Which ice cube will melt first? Why? Why does ice melt?
Why might one ice cube melt more quickly than the other?

5 Observe Describe what you saw happen

6 Explain Write a scientific explanation of what you saw happening.
What is the temperature of ice? What is needed to melt ice? Where does it come from? How and why does it go into the ice? Extension: why does metal feel colder to touch than plastic?

7 Melting Ice Watch video

8 Diagram of energy flow into ice

9 Diagram of energy flow out of finger

10 Further Questions Ice melts more quickly on a metal block than on a plastic one. Would the result be different if ice cubes were placed in a metal box and a plastic box, so that they were completely enclosed? You are supplied with samples of several different materials. How could you adapt this experiment to put them in order, from best conductor to worst conductor? Why do some materials feel warmer to the touch than others?

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