1. CH 2 SEC 3
ENERGY AND MATTER

3. ENERGY 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!

5. ENERGY AND MATTER
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.

6. TEMP AND THERMAL 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

7. COPY TO NOTES

8. CH 2 SEC 3 PART 2

9. FORMS OF ENERGY
KEY- WHEN MATTER CHANGES THE MOST COMMON FORM OF ENERGY RELEASED OR ABSORBED IS THERMAL ENERGY
FOR EXAMPLE- ICE ABSORBS THERMAL ENERGY FROM ITS SURROUNDINGS WHEN IT MELTS. THAT’S WHY YOU CAN PACK A COOLER FULL OF ICE AND FOOD AND KEEP IT COLD.

10. TIP OF THE ICEBERG!

11. FORMS OF ENERGY ENDOTHERMIC CHANGE- IS WHEN ENERGY IS TAKEN IN.
EXAMPLE- ICE MELTING

12. EXOTHERMIC CHANGE- WHEN ENERGY IS GIVEN OFF
EXAMPLE- WARMING YOUR HANDS OVER A FIRE

13. CHEMICAL ENERGY
CHEMICAL ENERGY- IS STORED IN THE CHEMICAL BONDS BETWEEN ATOMS
EXAMPLE- IT IS STORED IN THE FOODS YOU EAT, IN GASOLINE USED AND EVEN IN THE CELLS OF YOUR BODY

14. KEY- WHEN CHEMICAL CHANGE OCCURS, CHEMICAL BONDS ARE BROKEN AND NEW BONDS ARE FORMED
EXAMPLE- WHEN A MATCH BURNS, SOME OF THE CHEMICAL ENERGY CONTAINED IN THE COMPOUNDS OF THE MATCH IS TRANSFORMED INTO THERMAL ENERGY GIVING OFF HEAT AND LIGHT

15. CHEMICAL CHANGE – some thing new is created!