Characteristics  Properties of Matter

1. Particles of matter have space between them:

Activity 1:

1. Put an unlit incense stick in a corner of your room. How close do you have to go near it so as to get its smell?

2. Now light the incense stick. What happens? Do you get the smell sitting at a distance? Record your observations.

Activity 2:

1. Take two glasses/beakers filled with water.

2. Put a drop of blue or red ink slowly and carefully along the sides of the first beaker and honey in the same way in the second beaker.

3. Leave them undisturbed in your house or in a corner in the class. Record your observations.

4. What do you observe immediately after adding the ink drop? What do you observe immediately after
adding a drop of honey?

5. How many hours or days does it take for the colour of ink to spread evenly throughout the water Record your observations.

Activity 3:

1. Drop a crystal of copper sulphate or potassium permanganate into a glass of hot water and another containing cold water.

2. Do not stir the solution. Allow the crystals to settle at the bottom.

3. What do you observe just above the solid crystal in the glass? Record your observations.

2. Particles of matter are continuously moving:

1. Particles of matter are continuously moving, that is, they possess what we call the kinetic energy.

2. As the temperature rises, particles move faster. So, we can say that with an increase in temperature the kinetic energy of the particles also increases.

3. intermixing of particles of different kind of matter on their own is called diffusion.

3. Particles of matter attract each other:

Activity 1:

1. Take an iron nail, a piece of chalk and a rubber band.

2. Try breaking them by hammering, cutting or stretching.

3. In which of the above three substances do you think the particles are held together with greater force? iron nail.

Activity 2:

1. Open a water tap, try breaking the stream of water with your fingers.

2. Were you able to cut the stream of water? No