Meera added blue copper sulphate crystals to some water in a beaker. The copper sulphate dissolved in the water.
1 give one way meera could see that the copper sulphate had dissolved in the

The solid crystals disappeared

Explanation:

When a soluble solid solute is added to water, the solid solute disappears after a little while. The disappearance of this solute indicates that the solute has been dissolved in water.

In this case, blue copper sulphate crystals are added to water, the blue crystals disappear leaving only a blue solution. The disappearance of these blue copper sulphate crystals indicates that the substance has dissolved in water.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it