Some Natural Phenomena
Some objects gets charged when rub with some other specific object. The electrical charges produced by rubbing are static. There are two types of charges: positive charge and negative charge. Like charges repel and unlike charges attract each other. An electric current is produced when charges move. The electrical charge can be transferred from a charged object to another through a metal conductor.
The device used to detect charge is known as electroscope. The process of transfer of charge from a charged object to the earth is known as earthing.
Lightning is the process of discharge between the clouds and the earth or between different clouds. Lightning strike could destroy life and property. Lightning conductors are the devices used to protect buildings from the lightning.
An earthquake is a sudden shaking or trembling of the earth which lasts for very short time. Major earthquakes cause great loss of life and property. Earthquakes are caused by a disturbance deep inside the earth’s crust. Earthquakes tend to occur at boundaries of earth’s plates which are called fault zones. Necessary precautions should be taken for the protection from earthquakes.