Describe an experiment to show :
like charges repel each other.

Describe an experiment to show : Unlike charges attract each other.

Describe an experiment to show that ascent of sap takes place through xylem.

Describe an experiment to show that air expands on heating.

Describe an experiment to show that sound can travel in water.

Describe an experiment to show that oxygen is evolved during photosynthesis.

Describe an experiment to show that the plant loses water through its leaves.

Describe an experiment to show that electricity flows only if the circuit is complete and it does not flow if the circuit is incomplete.

Describe an experiment to show that sound can travel in a solid.

Describe one experiment to show that liquids expand on heating.

Like poles attract each other.