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.
Humans do, in fact, use 100% of their brain. EDIT: If you use 100% all at the same time you'd have a seizure. What I'm saying is that every part of the brain has a function. If you were to damage any part of your brain, you would experience symptoms of brain damage.