Activity 1.8 Class 9 Science Matter in Our Surroundings

This activity explains the force of attraction present between water molecules.

Table of Contents

To observe the force of attraction between particles in liquids

1. Running tap water

We Open a water tap, and let the water flowing continuously. Now we try to break the stream of water with our fingers.

We find

1. The water stream break for a moment when it is touched with finger but as fingers are removed, it join back.

2. We cannot break water stream permanently.

Water molecules are attracted due to cohesive force, this attraction between similar molecules keeps the stream unbroken.

This activity explains that water molecules are attracted with cohesive force.