Physical and Chemical Changes (भौतिक एवं रासायनिक परिवर्तन) - Chapter Study Notes & Summary

Science (SAT) in Scholarship Exams — Understanding vs. Memorising

In the Scholastic Aptitude Test (SAT) section of NMMS, Navodaya, and Sainik School exams, Science questions are almost never definition-recall. They test whether a student can apply a concept to a new situation — for example, asking why a metal spoon heats up faster than a wooden one (Heat, Metals & Non-Metals), or what happens to a flame in the absence of oxygen (Combustion). The most common mistake is mugging chapter summaries without reading NCERT diagrams and activities. Diagrams in NCERT Class 7 and 8 Science chapters are directly converted into exam questions — a student who has studied the diagram of cell structure can answer three types of questions; one who has only read the text can answer one. Study tip: after finishing each NCERT Science chapter, close the book and try drawing the main diagram from memory. If you cannot, re-read that section. This technique forces recall rather than passive reading. Combine this with solving the 'In-Text Questions' and 'Exercise Questions' from NCERT — they are frequently paraphrased directly in scholarship papers.