Step 3 - Engineering - Make a Diver. Design and make!

We made a Diver from plasticine. 

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We attached them to a bent straw with a paper clip.

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We added water, closed the lid and squeezed the bottle.. 

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Water pushed up the straw and the Diver became heavy and then sank.

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I released my squeeze. Water came out and the Diver floated to the top again.

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