help!!!!!!!!!!!?

Question

how would the properties of density, mass, and volume tend to change with temperature?

Answer 1

It depends on which element you are talking about. Water, for instance, increases in volume when it freezes, while many other elements increase when heated.

Answer 2

Generally, a substance, when heated will expand or contract on cooling. Volume will increase on heating and decrease on cooling.
This will cause a change in Density...Decrease on heating, and Increase on cooling.

Mass will be unchanged.

Pure water however is a little different. On heating or cooling to a temperature above or below 4°C, it will expand and continue to expand when vaporising or freezing. At 4°C, water is at its maximum density. Water is the only known substance to have these properties.
(It's Total mass however will also not be changed, even when vaporising. The liquid mass will decrease due to the formation of steam but, the mass of steam vaporised PLUS the mass of water remaining will be equal to the same mass with which you started).

Answer 3

Density is mass/volume.

So as temperature is raised the volume increases, but there is no gain of mass. Consequently, density becomes less.

Conversely as temperature is decreased, volume decreases, but again there is neither gain nor loss of mass. Consequently, density becomes greater.