Properties of Materials

 It is very easy, if we know the properties of different materials, we can easily classify them and keep in one group. So, as science student, you should know them.

1. Appearance 

Appearance is first property of material. When we see different material, they will look different and by closing eyes if we touch, the feel different. Plastic will look different from wood. Wood will look different from steel. By closing eyes, touch steel glass and mud glass, you can feel the difference. That is appearance property of material.

2. Hardness or Softness Property

Some material are hard when we touch it and it will press properly. For example steel glass. Other materials are soft. They can easily compressed like sponge or chalk or cotton bag. Material which are hard and if there is scratch on it, we can add soft material powder for closing its scratch.

3. Soluble or Insoluble Property

The material which can mix in other material or water and disappear own existence, we will say soluble material. For example, salt, sugar, chalk powder.

Material which does not mix in other material or water,  will be insoluble material. Like sawdust or sand

Some liquid may be soluble or insoluble. Fruit juice is solubility in water. But mustard oil does not soluble properly in water. 

Some gases can mix in the water like Oxygen can easily mix in the water.

4. Float or Sink Property

Any material which is insoluble will either float or sink

Float material are those which can easily come on the surface of the water l

ike wood, leaves or plastic. 

Sink material are those which can easily reach at the bottom of water. Like iron key.

5. Transparency or Translucent or Opaque

If any material will allow the light to cross its whole body, it will become transparent material and it will have transparency property. We can see fully back of same material

If any material will not allow full light to cross its body, it will translucent, we can see back of this material blur 

If any material does not allow to cross its body, it will be opaque like brick wall. We can not see back of brick wall.