For example, the brown crust on atoaste d marshmallow is the result of sugar changing to iffer-ent substances in a mixture called caramel. A change in matterthat produces one or more new substances is a chemicalchange, or chemical reaction. The burning of gasoline in acarâs engine is a chemical change.
How much brain power does the average person use? About only 10% Though an alluring idea, the 10 percent myth is so wrong it is almost laughable, says neurologist Barry Gordon at Johns Hopkins School of Medicine in Baltimorâ¦e.
Human brain and skull. The 10 percent of the brain myth is the widely perpetuated urban legend that most or all humans only make use of 10 percent (or some other small percentage) of their brains. It has been misattributed to many people, including Albert Einstein.uman brain and skull. The 10 percent of the brain myth is the widely perpetuated urban legend that most or all humans only make use of 10 percent (or some other small percentage) of their brains. It has been misattributed to many people, including Albert Einstein.