THE LIVING ORGANISMS AND THEIR SURROUNDINGS
MOTION AND MEASUREMENT OF DISTANCE
LIGHT
NOTES What makes things visible? We can see the world through our eyes or our sense of sight. However, we cannot see anything without the l...
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NOTES Source of light: An object which emits light, is called a source of light. For example, sun, torch, etc. Non-luminous objects: Thes...
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NOTES Deforestation Clearing of forests and trees eventually using that land for other purposes like agriculture and other human activities...
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COMBUSTION AND FLAME NOTES Combustion A chemical process in which a substance reacts with oxygen to give off heat and light is called comb...
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