Exponent and Logarithms can be defined as
The power of the base 10 in exponentional term is called Exponent
All numbers are conveniently expressed in power of 10 are called Exponential Term and method of this expression is called Exponential Notation
When the number is written in form of power, then power itself is called Logarithms of a base of given number.
For example in the expression
x is the logarithm of y to the base a,therefore it can be written as
The logarithm with the base 10 is called Common Logarithm.