Created by StemPy LabUnder a microscope, the tiny grains of smoke in a glass box jump about in a zigzag way, all the time. What makes them move?
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← Which of these is NOT matter?Three things spread by themselves. (P) The smell of incense spreads across a room. (Q) A drop of ink spreads in a glass of still water. (R) The blue colour of a copper sulphate crystal spreads up from the bottom of a beaker of water. Which order is from the fastest to the slowest? →
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