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The shape of an object can help it to float or cause it to sink.

The boat-shaped Plasticine pushes down on a bigger bit of water. The water can push up more of the Plasticine and hold it up so the boat floats. The lump of Plasticine pushes down on a small bit of water so it sinks. The shape of an object can help it to float or cause it to sink. Try this.

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