1) Approximately how much did human brains weigh 7 million years ago? a) about 450g b) the same as today, about 1.35kg c) 10 times less than today 2) Do intelligent people have bigger brains? a) no, it is always the same size b) sometimes c) always, the more intelligent you are, the bigger your head is 3) What is the average IQ in population? a) between 110 and 130 b) between 90 and 110 c) between 70 and 90 4) How much water does human brain consist of? a) about 10% b) about 50% c) about 75% 5) How can people train their brains? a) eat more sugar b) drink alcohol c) use it a lot

The human brain

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