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Please tell an activity with material, concepts required, method, conclusion all descripted to describe law of conservation of mass for class 9



Aim:to prove law of conservation of mass
material required:water,test tube,beaker,weigher
procedure:take some water in a beaker and some in test tube and put the test tube in the beaker but don,t allow the water in the beaker and the water in the test tube to mix.now weigh it.note down the readings.now totally mix it.again weigh it.we observe that weight does not change

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