Question

How can I prepare a model to demonstrate movement of particles in solids, liquids and gases?

NCERT Class 9th Science Ch 1 Matter in Our Surroundings

Answer 1

Aim: To demonstrate the movement of particles in Solids , liquids and gases.
Materials required:
1. chick peas or Thermocol balls,
2. Rubber band,
3. string,
4. Balloon,
5. transparent jar
Procedure:
1. Take the transparent jar .
2. Pour chick peas or thermocol balls
3. Take a piece of stretched balloon and
4. Tie it to the mouth of jar tightly with rubber band
5. Sew a string to the middle of balloon.
Observation:
Now the pull the string gently, we can observe the movement
Of solids
If you pull rapidly we can see the movement of solid getting converting to Liquid and gas.

Answer 2

Answer:

A model for happy converting of solid to liquid and liquid to gas

Explanation:

For making this model you will need:

• A transparent jar
• A big rubber balloon or piece of stretchable rubber sheet
• A string
• A rubber band
• Few chick-peas or black gram or dry green peas.

How to make?

• Put the seed
• Sew the string to the center of the rubber sheet and put some
• tape to keep it tied securely.
• Sew the string to the centre of the rubber sheet and put some tape to keep it tied securely.
• Stretch and tie the rubber sheet on the mouth of the jar.
• Your model is ready. Now run your fingers up and down the  string by first tugging at it slowly and then rapidly.

Observation:

• Now the pull the string gently, so that we can observe the movement of solids
• If you pull rapidly we can see the movement of solid getting converting to Liquid and gas.