Draw the diagram of a clinical thermometer and label its parts.

Explain the construction and working of an Telephone.

A student made a circuit by using an electric cell, a switch, a torch bulb (fitted in the bulb holder) and copper connecting wires. When he turned on the switch, the torch bulb did not glow at all. The student checked the circuit and found that all the wire connections were tight.
What could be the possible reason for the torch bulb not glowing even when the circuit appears to be complete?

Explain the following statement: Digestion is a chemical change.

How the iron blade is fixed into a wooden handle in tools used to dig the soil?

Boiling of water is a physical change; but boiling of egg is a chemical change. Why?

In a situation, how to explain, while your friend ask what is this, never seen before?

Virus is called Acellular. Why?

Explain about five kingdom classification

Which kingdom has saprophytic, parasitic and symbiotic nutrition. Why?