From Wikipedia, the free encyclopedia. Permanent Account Number (PAN) is a code that acts as identification of Indians, especially those who pay Income Tax. It is a unique, 10-character alpha-numeric identifier, issued to all judicial entities identifiable under the Indian Income Tax Act 1961. IT PAN card is issued under Section 139A of the Income Tax Act. 2  The PAN structure is as follows: AAAPL1234C: First five characters are letters, next four numerals, last character letter. 3  The first three letters are sequence of alphabets from AAA to ZZZ. 4  The fourth character informs about the type of holder of the card.
The scientific method is a body of techniques for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge. To be termed scientific, a method of inquiry is commonly based on empirical or measurable evidence subject to specific principles of reasoning.
The scientific method is the basis of scientific investigation. A scientist will pose a question and formulate a hypothesis as a potential explanation or answer to the question. The hypothesis will be tested through a series of experiments. The results of the experiments will either prove or disprove the hypothesis. This category should contain questions and answers regarding the scientific method.