In this page scientific notation practice questions we are going to see some practice questions of the topic scientific notation.
In Exponents and Scientific Notation, scientific-notation is one of the ways of writing numbers that are too large or too small to be conveniently written in decimal representation.
In subjects, such as astronomy, physics, chemistry and engineering, we come across very large numbers and very small number. For example if we have,
(i) The distance of earth from sun is about 92,900,000 miles.
(ii) The average cell is containing about 200,000,000,000 molecules.
Such numbers are not so easy and manipulate in the decimal form. However, they can be written and manipulated easily using the laws of indices. If "m" is natural number and a is a real number, then am means the product of m numbers each equal to a, that is, a^m= a x a x a ………..m factors. Here a is known as base and m, the power or exponent or index.
When the number is written in scientific notation a x 10^n, the integral part of the number, a is a digit from 1 to 9 and the power of 10 is an integer (positive , negative or zero). We also observe that while converting a given number into scientific notation, if the decimal point is moved n places to the left, then this movement is compensated by factor 10ⁿ, and if the decimal point is moved n places to the right, then this movement is equated by the factor 10⁻ⁿ