Yes. That's how they maintain a gaseous state.
Yes, fresh water has a slightly lower density than salt water.
Oil floats on water, and has a lower density.
A substance has lower density than water when it floats on water. This indicates that the substance is less dense than water.
The density of ice is lower than the density of water.
The density of snow is lower than the density of water.
If a substance floats in water, it is less dense than water. This means that its mass per unit volume is lower than that of water. Substances with lower density will float on top of substances with higher density.
The density of ice is lower than the density of water.
Not all liquids have lower densities than all solids. Low density solids frequently contain air or other gasses as part of their makeup (cok, Styrofoam, etc)
The density is lower than the density of water.
If a block of substance floats in water, it means that the substance is less dense than water. This indicates that the density of the substance is lower than that of water, which has a density of 1 g/cm³.
Yes, that's correct. If an object has a density lower than that of water, it will float. If it sinks, then its density is greater than that of water.
No, an object with a larger density than water will sink in water. Objects float when they have a lower density than the liquid they are placed in.