Answer:
Mass is how heavy something is, volume tells you how big it is, and density is mass divided by volume. you can usually think of weight and mass as the same thing.Volume is the size of an object, and mass is its weight. Density is calculated by dividing an object’s mass by its volume. Density is sometimes used to describe other quantities divided by volume, such as energy density.
They survive without water by entering a special mode, otherwise called as shriveling. They can lose even 95% of water in their body and still live, even though they would look like dead plants, they would actually be alive. In the absence of water, tardigrades use a sugar called trehalose, which becomes their source of life until they find some water.
Water is warmed by the sun and is evaporated. It is then cooled down and condensed. Finally, it is brought back to Earth in the form of water droplets (Rain)
I hope it helps!^^ May the power of unicorns be with you!