Describe a simple activity to show that molecules have spaces between them.

The simple activity to show that molecules have spaces between them is given below :

Aim : To demonstrate the presence of spaces between particles of matter

Materials Required : A measuring cylinder (100 mL), a glass rod, powdered sugar, a spoon and water

Procedure :

• Take 100 mL water in a measuring cylinder and mark the level of water.
• Dissolve some powdered sugar in it with the help of a glass rod as shown below.

Observation : You will observe that even though the sugar has dissolved, the water level is same as before.

Conclusion : This activity shows that when sugar is dissolved in water, its molecules go into the spaces present between the water molecules. Due to this, there is no change in the water level when sugar is added to it. Hence, spaces are present between molecules of matter.