home *** CD-ROM | disk | FTP | other *** search
- ½@AtGraphic 273,12
- @picture summary.bmp
-
-
-
- @At 138,61
- #^#* #^A chemical change occurs when a substance undergoes a
- #t#ttransformation into another substance or substances.
-
- @At ,+30
- #t#*#tThe breakdown of a substance into two or more simpler substances
- #t#tis called decomposition.
-
- @At ,+30
- #t#*#tA chemical change is always accompanied by an exchange
- #t#tof energy either to the surroundings or from the surroundings.
- @At ,+30
- #t#*#tA chemical reaction can be written down as follows:
-
- @AtGraphic 199,285
- @picture ADA20T1.bmp
-
- @At ,+60
- @AtGraphic 202,325
- @picture Arrow.bmp
- #t#*#tThe indicates that a reaction has taken place.
-
-
-
-
-
-