When a substance has changed into something new or different so that the original substance is gone, as in digestion, radioactiv
e decay, or a battery in a flashlight producing light, it is known as a ______________________________. a.physical property
b.chemical property
c.physical change
d.chemical change
Physical change involves change which can be retrieved back . sugar is dissolved in water . It is physical change . because sugar can be retrieved by evaporating water.
burning of coal is a chemical change because the ash that we get after burning coal can not be turned into coal .
In the given case in the problem , after digestion , things that are formed are quite different . After radioactive decay new element is produced . In battery , current is produced after the chemical reaction which produces new products.
Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more. These molecules then bump into nearby particles and transfer some of their energy to them. This then continues and passes the energy from the hot end down to the colder end of the substance.
