Because it is aerated - that is, it has pockets of air in it.
The air is less dense.
Density is determined by the amount of mass in a given volume. Something is considered dense if it has a high mass for a given volume, while it is considered not very dense if it has a low mass for a given volume. Materials with tightly packed particles are usually dense, while materials with loosely arranged particles are less dense.
Yes, given the same volume of both.
its has more pressure
Not necessarily. The weight of an object is determined by its mass and the force of gravity acting on it, while density is a measure of how much mass is contained in a given volume. A heavier object can be less dense if it takes up more volume, or it can be more dense if it is compact and takes up less volume.
No. It gets less dense
The difference in weight between ice and water is that ice is less dense than water, so a given volume of ice weighs less than the same volume of water.
It would not be good for finding the volume of an object that is less dense than water. Such an object would float and therefore would not displace its full volume worth of water.
The less mass in a given volume of air, the lower the air density. This means the air is less dense, or lighter, in that volume compared to air with more mass. Air density affects various aspects of weather and climate, such as air pressure and the formation of clouds and precipitation.
The density of wax is less than water because wax is less dense than water. In other words, the mass of wax for a given volume is less than the mass of water for the same volume. This is why wax tends to float on water.
If the mass of a fixed volume of air increases, the density of the air becomes more dense. Density is defined as mass divided by volume, so as the mass increases while the volume remains constant, the density increases.
No, it does not.