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.
1 THE CEREBRUM â control center of the brain. 2  Largest and most prominent part of the human brain.Brain is the cerebrum 85% OF THE WEIGHT OF HUMAN BRAIN. 3  Responsible for all voluntary activities of the body,site of INTELLIGENCE,LEARNING AND JUDGEMENT. THE BRAIN AND FIVE SENSES BRAIN-responsible for overseeing the daily operations of the human body and for interpreting the vast amount of information recieves.the adult human body brain weighs an average of 1.4 kg or about 2% of the total body weight. 2  2.