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Answer the following: a) Liquefied petroleum gas is used in kitchens. When the gas is in a cylinder, it is in the liquid state. When it comes out of the cylinder it becomes a gas (change A), then it burns (change B). Identify the processes A and B. b) How does the ozone layer in the atmosphere protect us from harmful ultraviolet rays? [5 MARKS] |
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Answer» Answer the following: |
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