Well, a compound forms whenever two or more atoms form chemical bonds with each other. Each molecule of water consists of one oxygen atom chemically bonded to two hydrogen atoms.
Knowing specifically and accurately that water is for sure a compound makes it special and very interesting.
Nitrogen is important to life because it is a key part of amino and nucleic acids. Also, it is an important part of ATP, which is the basic energy molecule for living things. Neither plants or animals can obtain nitrogen directly from the atmosphere. Instead, they depend on a process known as nitrogen fixation.
The seasonal movement of animals from one place to another (usually occurs in species with ability to flight and in large amount
