1. Air, water, glass, paper, wood etc. are bad conductors of heat.

    Air, water, glass, paper, wood etc. are bad conductors of heat.

    See less
    • 4
  2. Substances that allow heat to pass through them are called conductors. Metals like silver, copper, iron, aluminium etc. are good conductors of heat.

    Substances that allow heat to pass through them are called conductors. Metals like silver, copper, iron, aluminium etc. are good conductors of heat.

    See less
    • 4
  3. Saliva mixes with bread and converts starch present in the bread to sugar. Thus it gives sweet taste.

    Saliva mixes with bread and converts starch present in the bread to sugar. Thus it gives sweet taste.

    See less
    • 5
  4. Infection due to bacteria and virus, food that is not digested by the body, diseases of intestine etc. are the causes of diarrhoea.

    Infection due to bacteria and virus, food that is not digested by the body, diseases of intestine etc. are the causes of diarrhoea.

    See less
    • 3