Science Fill in the blanks: [1 M]

lightning

fragmented

an electric current

Lightning conductor

lightning conductor

crust

positive, negative

Insulator

equal, unlike

magnitude

earthing

Tsunami

thunder

Earthquake

Seismograph

tectonic plates

charged, metal

static

electric spark

In an electroscope, the aluminium leaves diverge because like charges repel. Explanation: The aluminium foil strips receive the same charge from the charged objects. The strips carrying similar charges repel each other and they become wide open.

Like charges repel unlike charges attract.
Explanation: There are two types of charges: Positive charge and negative charge. Like charges repel each other and unlike charges attract each other.

Lightning is nothing but an electric spark. Explanation: Lightening is the name given to the flash of light which occurs in the sky during the rainy season. The process of electric discharge between clouds and the earth or between different clouds causes lightning.

Rubbing glass with silk makes a positive charge on the glass.Explanation:
After rubbing the glass rod with silk cloth, the glass rod becomes positively charged. The silk cloth becomes negatively charged.

Earthing is provided in buildings to protect us from electric shocks due to any leakage of electric current.
Explanation:
The process of transferring of charge from a charged object to the earth is called earthing.

The charging of an object by rubbing it with another object is called charging by friction.
Explanation:
The electric charges generated by rubbing are static electric charges. These electric charges remain bound on the surface of the charged object.

Combing your hair makes a negative charge on the comb.
Explanation: The combing of hair make the comb negatively charged. It is able to attract tiny pieces of paper which are neutral.

The negatively charged particles which are transferred from one object to another during charging by friction are called electrons.
Explanation: For example, when a glass rod is rubbed with silk, some of the electrons from the glass atoms are transferred to silk. Due to the deficiency of electrons in the glass atoms, it becomes positively charged. Whereas the silk has acquired electrons, it becomes negatively charged.

Each fragment of earth's crust is called a Plate.
Explanation: The outermost layer of the earth is fragmented. Each fragment is called a plate. These plates are in continual motion.