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Because density is the relationship between weight and volume. If you're just increasing volume, making the stuff fluffier, then for each unit of volume the weight will be less.

Let's say you have a cup of cream. If you turn it into whipped cream it'll still weigh the same, but now it won't fit in the cup any more. More volume, same weight - lower density.

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12y ago
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14y ago

The density goes down when the volume goes up.

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Q: Why does density decrease when volume increases?
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Related questions

What happens to the density as the volume increases?

If volume increases while mass remains the same, the density will decrease.


What happens to volume if density increases?

Density = mass / volume. Therefore, if volume increases and mass doesn't change, density will obviously decrease.


What happens to density if the volume increase?

must decrease


How does the volume and density of a substance change when it is heated?

The volume of a substance increases when heated, causing a decrease in density.


What is happening to the substances mass and volume to cause this decrease in density?

A decrease in density would indicate a reduction in mass relative to the volume. If the mass decreases but the volume remains the same or increases, then the density would decrease.


Will density decrease or increase if mass stays same but volume increases?

density decreases


Explain what will happen to the mass volume and density of a liquid as the temperature increases?

If density = mass/volume, and your volume increases while mass remains the same... Then the denominator increases which would decrease the density


When air bubbles rises in water its volume increases what happens to its mass and density?

As the air bubble increases in volume, its mass remains constant. Because the mass remains constant but volume increases, density will decrease.


What happens if the density increases?

Density is a characteristic of a given material. Water, for example, has a certain density (which is somewhat dependent upon temperature but let's say that the temperature is constant). It does not matter how much water you have, it will all have the same density. One teaspoon has much less mass, but the same density as an entire ocean.


What happened with density of gases on heating?

As gases are heated up, its volume increases, resulting in a decrease of density.


When a substance changes from a solid to a liquid its density normally decreases. What is happening to the substance's mass and volume to cause this decrease in density?

A decrease in density would indicate a reduction in mass relative to the volume. If the mass decreases but the volume remains the same or increases, then the density would decrease.


Does water expand when turned to ice?

Yes. This increases its volume, which results in a decrease in its density.