Chemical Changes
Definition
A chemical change occurs when one or more substances change into an entirely new substances with different properties.
baking soda + vinegar in a bag
this experiment is an example of a formation of a gas and formation of a new substances.
Gooey Gak- glue+ water + borax solution
this experiment is an example of formation of a new substance and formation of a precipitate.
Iodine Clock- iodine + starch
this experiment is an example of formation of a new substance and unexpected color change.
types of chemical changes
•production of an odor
•production of a gas
•formation of a precipitate
•change of color
•change in energy