what is eutrophication

Eutrophication is caused by increase of plant growth such as algae to to increase of nutrients from fertilzers and pesticides.This decreases oxygen content in water leading to what is known as dead zone.

What are the different atomic theory ?

Dalton-Stated that atoms are indestructible and chemical reactions are rearrangments of atoms JJ thompson -Stated atoms contain particles called electrons .It was proven through cathode ray tube experiment.He compared atoms to a plum pudding structure. Ernest stated that nucleus is found at the centre of the atom Bohr model suggested that electrons move around in circles known as orbits

What is epidemiology

Epidemiology is the study of distrbution and determinant of a health related event or state.