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Objects float or sink because of their density.

An example of an object with low density is a sponge, as it has loads of air bubbles in it, and will float.

An example of an object with high density is a brick. This is because the brick doesn't have any air trapped in it, it is "packed in", and is more dense than water, therefore it will sink.

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15y ago

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More answers

Well, a sponge sinks if there is too much water in it. Basically, if a sponge takes in water, it gets heavier and sinks. Normally, a sponge floats, but if you pour 10 cups of water on it, I bet it will sink.

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14y ago
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Some types of sponges float, and others sink.

If the sponge soaks up water, then sinks, it means that the sponge material is actually denser than water, and the sponge was floating due to the air spaces in it. Once all of the air spaces fill up with water, its average density goes from less than water to greater than water, and it sinks.

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13y ago
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When water replaces the air in a sponge, it can no longer float. The air is what causes it to float.

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Wiki User

16y ago
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Because the sponge is less dense than the water

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15y ago
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sink, because it absorbs water then weighs to much for the water to hold then sinks.

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Wiki User

12y ago
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Yes

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Wiki User

14y ago
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Q: Does sponge sink in water
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