WALA: WHAT AFFECTS THE SIZE OF A SHADOW.

WALA: WHAT AFFECTS THE SIZE OF A SHADOW.

L.O: Investigate how the size of a shadow is affected by the position of the object.

Introduction

learners to display some of the shadow puppets they made.

Choose some students to demonstrate how to make heir shadow puppet change in size .Get them to try different things e.g moving the puppet closer to the screen or further from the screen

VIDEO

THE SIZE OF SHADOW

https://www.youtube.com/watch?v=bepLxu65OdM

OFFLINE ACTIVITY

Attempt Activity 5.4 in learners book pages 72 and 73.

Answer the 5 questions on the next slide correctly after the activity.

Questions

1. Identify the factor that you kept the same in your investigation.

2. identify the factor that you changed.

3. Were your measurements the same the second time?

4. Do you think repeating measurements makes results more reliable>

5. Write down your conclusion.

Conclusion

1. We kept the distance between the light source and the screen the same.

2. The factor we changed was the position of the shadow puppet.

3. They were probably not exactly the same the second time.

4.Repeating measurements means you can take an average result which is more reliable than just using your first measurement.

5. Conclusion: the closer the object to the light source the bigger the shadow