Glowing of an electric bulb is a) Physical and reversible b) Chemical and irreversible c) Physical and irreversible d) Chemical and reversible
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Glowing of an electric bulb is _________ type of change.
A. Physical
B. Chemical
C. Both physical and chemical
D. None of these
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Hint: Size, shape, colour and state are all physical properties of a substance. When an observable change is seen in these properties of a substance, we call it a physical change.
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- Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.
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