1What is lightning called? Explain how lightning strikes the Earth.
2Why does lightning not flash when the sky is clear, or when there are clouds but no storm?
3Why is it dangerous to sit under a tall tree or a building while lightning is flashing?
4Why should electrical goods not be used in the house while lightning is flashing?
5When lightning strikes, why is the sound of thunder heard only some time after the flash is seen?
6How can a house or a building be saved from lightning?
7A lightning rod does not push lightning away. Explain how it actually protects a building.
8A negatively charged cloud comes close above a house. Explain how it can cause lightning to strike the house.
9Why are pieces of coal and salt put into the earthing pit, and why is it kept damp?
10You see a flash and hear the thunder 12 seconds later. How far away was the strike, and what should you do?