7th Class Science Notes Chapter 9 (Waves and Energy) Solved Exercises July 23, 2024 by Muna Bhai Class 7 General Science Notes Chapter – 01 Plants SystemChapter – 02 Human Respiratory and Circulatory SystemChapter – 03 Immunity and DiseasesChapter – 04 Structure of an AtomChapter – 05 Physical and Chemical ChangesChapter – 06 Chemical BondsChapter – 07 SolutionsChapter – 08 Force and MotionChapter – 09 Waves and EnergyChapter – 10 Heat and TemperatureChapter – 11 Technology in Everyday LifeChapter – 12 Earth and Space