CH 2 SEC 3 ENERGY AND MATTER.  ENERGY- IS THE ABILITY TO DO WORK OR CAUSE CHANGE.  KEY- EVERY CHEMICAL OR PHYSICAL CHANGE IN MATTER INCLUDES A CHANGE.

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Presentation transcript:

CH 2 SEC 3 ENERGY AND MATTER

 ENERGY- IS THE ABILITY TO DO WORK OR CAUSE CHANGE.  KEY- EVERY CHEMICAL OR PHYSICAL CHANGE IN MATTER INCLUDES A CHANGE IN ENERGY.  KEY- LIKE MATTER ENERGY IS NEITHER CREATED OR DESTROYED IN CHEMICAL REACTIONS, BUT CAN CHANGE FROM ONE FORM TO ANOTHER! ENERGY

 EXAMPLE- WHEN CHARCOAL BURNS IT RELEASES ENERGY IN THE FORM OF HEAT AND LIGHT.  KEY- FORMS OF ENERGY RELATED TO CHANGES IN MATTER INCLUDE; THERMAL ENERGY, CHEMICAL ENERGY, ELECTROMAGNETIC ENERGY, AND ELECTRICAL ENERGY. ENERGY AND MATTER

FORMS OF ENERGY

 TEMPERATURE- IS A MEASURE OF THE AVERAGE ENERGY OF RANDOM MOTION OF PARTICLES OF MATTER  THERMAL ENERGY- IS THE TOTAL ENERGY OF ALL THE PARTICLES IN AN OBJECT. EX- HOT CUP OF COFFEE RELEASING T. E.  THERMAL ENERGY- ALWAYS FLOWS FROM WARMER MATTER TO COOLER MATTER TEMP AND THERMAL ENERGY

EARTHS TEMPERATURE

COPY TO NOTES

 ENDOTHERMIC CHANGE- IS CHANGE WHEN ENERGY IS TAKEN IN.  EX- ICE MELTING, THE ICE TAKES IN THE ENERGY FROM IT SURROUNDINGS FORMS OF ENERGY

TIP OF THE ICEBERG ENDOTHERMIC

 EXOTHERMIC CHANGE- ENERGY IS GIVEN OFF.  EX-WHEN CHARCOAL BURNS IT RELEASES ENERGY IN THE FORM OF LIGHT AND HEAT CHANGES IN ENERGY

EXOTHERMIC

 KEY- DURING A CHEMICAL CHANGE, CHEMICAL ENERGY MAY BE CHANGED TO OTHER FORMS OF ENERGY.  EX- WHEN YOU PUSH A BIKE AND YOURSELF UP A HILL, CHEMICAL ENERGY FROM FOODS YOU ATE IS TRANSFORMED INTO ENERGY OF MOTION. TRANSFORMING ENERGY

 KEY- ONE OF THE MOST IMPORTANT ENERGY TRANSFORMATIONS ON EARTH THAT INVOLVES CHEMICAL ENERGY IS PHOTOSYNTHESIS.  KEY- DURING PHOTOSYNTHESIS, PLANTS TRANSFORM ELECTROMAGNETIC ENERGY FROM THE SUN INTO CHEMICAL ENERGY AS THEY MAKE MOLECULES OF SUGAR.  KEY- WHEN WE EAT PLANTS AND ANIMALS WE TRANSFORM THE ENERGY ONCE AGAIN TO ENABLES US TO LIVE.

PHOTOSYNTHESIS SKETCH

 ergy/ ergy/ BRAINPOP

 1-AB  2-ABC Q &A P.77

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