No. It may change its weight if weighed at varying depths.
No
You can change the mass of water in two ways: increase or decrease the amount of water or change the isotopic composition of the molecules of water. The first will have no effect on the mass of 1 cc of water. The second will. If you replace the hydrogen atoms in the "normal" water molecules with deuterium atoms you will increase the density (mass/cc) of the water.
When mass increases and volume stays constant, the density increases. When volume increases and mass stays constant the density decreases. When they both change, then the density will depend on the rate of change of mass and the rate of change of volume.
Volume
To change density there are three ways. You can change the shape, mass or volume of the object
Density = mass / volume. So if the volume changes, the density will obviously also change.
You can change the density of a substance by changing its volume. Density is equivalent to mass over volume. So changing the volume affects density.
Changing the mass or volume of an object changes its density. Density is defined as the mass of an object divided by its volume, so if either the mass or volume changes, the density will change accordingly.
The volume increase, mass does not change.
No
changing mass and volume
To change the volume of an object without changing the mass, you could alter its density by changing its component materials. For example, replacing a heavier material with a lighter one or adjusting the shape of the object to increase or decrease the volume while keeping the mass constant. Additionally, you could change the pressure or temperature surrounding the object which may lead to a change in volume without affecting mass.
If you mean why does the density of an object not change when it undergoes a physical change such as a change of shape then the answer is because density is a chemical trait found by dividing the mass by the volume and if you modify the volume then the mass will also be modified for example water has a density of 1 g/cm^3 meaning if you have 3 grams of water it takes up 3 cm^3 even if you change the mass when you change the mass you are also changing the volume same goes if you change the volume you change the mass. In other words mass and volume are relative to each other and when you divide mass by volume you get a number the density the density represents a ratio for water the density is 1 g/cm^3 the ratio of mass to volume is 1:1,1/1, or 1 to 1 meaning for every cm^3 you have of water you will have an equivalent amount of grams. 1 to 1 1 part mass 1 part volume but that is just for water every substance has a density and they rarely if ever are equal.
Density is a property that depends on the mass and volume of the object, not its shape. Changing the shape of an object does not alter the amount of mass or volume it contains, so the density remains the same.
No, changing the volume of a container filled with gas will not change the mass of the gas. The mass of the gas remains constant unless gas is added or removed from the container. Changes in volume only affect the pressure and density of the gas.
To change an object's density, you can change either its mass or volume. Increasing the mass or decreasing the volume will increase the density, while decreasing the mass or increasing the volume will decrease the density.
Changing an object's volume without changing its mass can be achieved by altering its density. This can be done by increasing or decreasing the spacing between its molecules or particles, without adding or removing any material. For example, compressing a gas would decrease its volume without changing its mass.