Business correspondence is the process of dispatching administrative and commercial documents both in private and public enterprises by...

Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure.The geolog...

Biochemistry studies the chemical composition of living cells and organisms and the chemical processes that underlie their vital functi...

Biology is the science of life and living organisms, their diversity, origin, structure and development (bios - life, logos - teaching)...

The idea that the substance consists of the smallest, indivisible particles (atoms) arose quite a long time ago.In 1808 J. Gay-Lussac...

Aviation is an activity covering the creation and use of aircrafts, ground infrastructure, special knowledge and skills.Aviation is a...