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8th grade Science

Chemical Change

QuestionAnswer
CHEMICAL CHANGE.......... SOMETHING YOU DIDN'T START WITH. The Substance is changed into a different substance.
CHEMICAL CHANGE INCLUDES BURING RUSTING DECOMPOSING TARNISHING
BURNING ANYTHING WHEN SOMETHING BURNS IT CAN NOT BURN AGAIN
LAW OF CONSERVATION OF MATTER MASS IS NEITHER CREATED NOR DESTROYED DURING A CHEMICAL REACTION
ABSORPTION OF ENERGY ENDOTHERMIC REACTION FEELS COLD
PHOTOSYNTHESIS ENERGY COMES FROM THE SUN
CHEMICAL REACTION IT RELEASES ENERGY IN THE FORM OF HEAT EXOTHERMIC
EVIDENCE OF CHEMICAL REACDTION 1.FORMATION OF A NEW GAS BUBBLES 2.FORMATION OF A NEW SOLID 3.COLOR CHANGE 4. CHANGE OF ENERGY WHEN A CHEMICAL CHANGES OCCURS ENERGY IS EITHER RELEASED OR ABSORBED HEAT/LIGHT
EXOTHERMIC REACTION IS WHEN RELEASE HEAT OR LIGHT OR BOTH
EATING CHEWING IS A PHYSICAL CHANGE ONCE SPIT TOUCHES THE FOOD CHEMICALS IN SALIVA BEGIN TO CHANGE THE FOOD CHEMICALLY
Physical Change A change in a substance that does NOT change what the substance is.
Physical change evidence change in shape, size, phase.
What type of change is usually reversible Physical
Created by: dirmiter