is sound heard by your cholestral?, the earth is smaller than mars?, is mixing an irreversible change, is this made of A.metal B.wood or C.made in a factory there might be more than one awnser, does your heart pulse get faster when you run, what do you need for a fire to be lit is it A water oxygen and heat or B heat oxygen and petrol or C heat oxygen and fuel, is cooking a reversible change , what is the name of the scientist that invented gravity, is the world covered in water or land more?, is oxygen needed for a tree to grow, if you put metal in boiling water it will rust faster than in oil.

5D will jones

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