Info@therightmentor.comSTUDY MATERIALPOLLUTION OF AIR AND WATER | SPEED NOTES | SCIENCE | CBSE | CLASS 8 Chapter – 18 Pollution of Air and Water Pollution: An undesirable change in the physical, chemical or biological characteristics ...
Info@therightmentor.comSTUDY MATERIALMICRO ORGANISMS FRIEND AND FOE | SPEED NOTES | SCIENCE | CBSE | CLASS 8Chapter – 2 Micro-organisms: Friend and Foe Micro-organisms: Micro-organisms aretoo small andare not visible to the unaided eye. Theycan...
Info@therightmentor.comSTUDY MATERIALMETALS AND NON METALS | SPEED NOTES | SCIENCE | CBSE | CLASS 8Chapter – 4 Materials: Metals and Non-Metals Metals arestrong and durable. Thus metals areused so widely for making almost everything...
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