You have the following materials- a steel paper clip, eraser, iron nail, a wooden pencil and a piece of plastic. How will you test whether the given material is a conductor or an insulator by using a simple electric circuit?

Solve the following crossword puzzle:

Across:

1. The materials that allow electricity to pass.

2. Thin wire of electric bulb.

3. Materials that do not allow electricity to pass.

Down:

1. When the circuit is incomplete.

2. Two or more cells connected end to end form.