Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids
Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids
Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids
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5. Place it in the water, <strong>and</strong> let it go.<br />
6. Challenge: Can you get your boat to move backwards <strong>and</strong><br />
forwards?<br />
QUESTIONS:<br />
1. What is the purpose of twisting the elastic b<strong>and</strong>?<br />
To store energy in the elastic b<strong>and</strong><br />
2. Why does the boat go?<br />
Stored energy in the elastic b<strong>and</strong> is changed into movement<br />
energy of the plastic <strong>and</strong> the boat<br />
3. How could you make the boat go in dierent directions<br />
(backwards <strong>and</strong> forwards)?<br />
Twist the piece of plastic in dierent directions. Twisting it<br />
towards the boat will make the boat move forwards, twisting<br />
it away from the boat will make it move backwards in the<br />
water.<br />
4. Write down what you have learnt from the last two activities<br />
that you have completed.<br />
Elastic b<strong>and</strong>s that are stretched or twisted store energy. The<br />
stored energy can be changed into movement energy when<br />
the elastic b<strong>and</strong> is released <strong>and</strong> returns to its normal shape.<br />
We have been looking at elastic b<strong>and</strong>s <strong>and</strong> how they can be<br />
stretched or twisted to store energy to do work (to produce<br />
movement). Springs can also be compressed or stretched to store<br />
energy.<br />
48 Energy <strong>and</strong> Change
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