1) To see atoms in a sand grain we would need to magnify it a) ten times b) a hundred times c) a thousand times d) a million times 2) How many KINDS of atoms are there in Nature? a) 1 b) 92 c) A billion 3) Which of these is NOT a kind of atom? a) oxygen b) dirt c) hydrogen 4) Air is made of atoms a) True b) False 5) Happiness is made of atoms a) True b) False

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