Definition of matter; solid, liquid and gas; characteristics - shape, volume, density; change of statemelting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, ...
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CBSE Open Book Assessment: CBSE will conduct open book exam in class 9, what is this? Know ...
CBSE Open Book Exam: CBSE is preparing to start the board Open Book Assessment (OBA) from session 2026-27. In this, students will be able to see books, class notes, and library books during the exam.
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