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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.
What else can I help you with?
If volume increases then pressure will do what?
decrease
What will happen to pressure when gas expands and volume increases?
When a gas expands and its volume increases, the pressure of the gas will decrease. This is because pressure and volume are inversely proportional according to Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume at constant temperature.
What happens to the density as the volume increases?
If volume increases while mass remains the same, the density will decrease.
In gases. What happens to the density of a given mass if the volume increases?
If the volume of a gas increases, the density of the gas will decrease. This is because density is mass divided by volume, so as the volume increases while the mass stays constant, the density will decrease.
Will the volume of metal decrease if it is heated?
No, the volume of a metal increases as it is heated. It expands.
Does a decrease in temperature results in a decrease or in crease in the volume of gas?
Temperature is directly proportional to volume i.e. as temperature increases volume of gas also increases and as it decreases, the volume also decreases
What happens to volume if density increases?
Density = mass / volume. Therefore, if volume increases and mass doesn't change, density will obviously decrease.
When the pressure of a gas increases at constant temperature its volume?
Temperature increases as pressure increases.
What are the changes that increases pressure?
- a decrease in volume- the increase of temperature
What happens to density if the volume increase?
must decrease
What is happening to the substances mass and volume to cause this decrease in density?
As the mass of a substance increases while its volume stays constant, its density will also increase. Conversely, if the mass of the substance stays constant while its volume increases, the density will decrease. This is because density is directly proportional to mass and inversely proportional to volume.
As a pressure of gas increases at coustant temperation its volume decrease?
Yes
