What Is a Dam and How Does It Function?
Dam is a barrier built across a river or sea which is high enough to stop the water flowing over it. In a river dam, the water which is hel
Tag
Reservoir
Why Are There Many Kinds of Soils?
Soil is one of the principal substrata of life on Earth, serving as a reservoir of water and nutrients, as a medium for the…
How Is Ink Made?
Ink is made from a pigment, or dye, and a liquid, called the vehicle, in which the dye is dissolved. There are two chief types of ink: Writi
How Does a Squid Use Its Ink to Escape Enemies?
Squid (and also octopus) belong to a group of animals called “Cephalopods” and these animals all shoot out ink, they jet it out with some wa
How Does a City Purify Its Water?
How Does a City Purify Its Water? Water in its natural state is often dirty, and usually must be purified to be safe for consumption. After