Questions

A homepage is a main or starting page of a website from where we can go to the individual pages by clicking the urls in it.

A storage device refers to a computing hardware used to store information permanently or temporarily. The device can be external or internal to a computer, server, and other computing systems.

There are two types of storage devices used with computers: a primary storage device, such as RAM, and a secondary storage device, like a hard drive. Secondary storage can be removable, internal, or external.

Here printer is not the storage device, it is an outut.

A chemical reaction in which involves the absorption of heat from the environment is called a Endothermic reaction. 

Examples : Dissolving ammonium chloride in water, photosynthesis, melting ice cubes, mixing of potassium chloride with water,...

In the contrast, chemical reactions involving release of heat are known as exothermic reactions.

Examples : Combustion, coal is burnt, mix of CaO with water,...

A fingernail.

The Indus Valley Civilization which is also known as Bronze age civilization started around 3300 BC and flourished in between 2600 - 1900 BC and started to decline in 1800 BC.

A microscope is an instrument that magnifies objects. Cells that were first observed by Robert Hooke in the year 1665 in the compound microscope.

Gravitational force is the force that binds everything at the surface of the earth. Gravitational force is maximum at Poles.