Definition of matter; solid, liquid and gas; characteristics - shape, volume, density; change of statemelting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, ...

CBSE Class 9 Open Book Exams from 2026-27, What You Need to Know: Students will be pleased to know that the CBSE has proposed an open-book assessment system for Class 9 for the 2025-26 academic ...