Why do we see water droplets on the outer surface of a glass containing ice-cold water?

$(a)$ What is matter? Write two properties of solids and two properties of liquids.
$(b)$ Ramesh took two beakers $A$ and $B$ containing hot water and cold water respectively. In each beaker,he dropped a crystal of copper sulphate. He kept the beakers undisturbed. After some time,what did he observe? Why?

During the evaporation process,the heat is:

Define the melting point of a solid. At what temperature in the Kelvin scale does ice melt? In the experiment to determine the melting point of ice,why does the temperature not rise until all the ice melts,even though heat is continuously supplied? What is this heat energy called?

Choose the correct statement from the following:

$A$ diver is able to cut through water in a swimming pool. Which property of matter does this observation show?