Mixtures and Solutions
PHYSICAL vs CHEMICAL CHANGES
Physical Change: When molecules are rearranged but their internal structures are not affected. This means that there is no change involved in the substance's identity.Characteristics of a Physical Change
*Texture can be different *Color change *Shape can change the substance but not its chemical composition. *Change of State (solid, liquid, gas) *Mixing substances together *Combining parts i.e. nailing wood together to form a chair Examples of a Physical Change *sharpening a pencil *a popsicle melting *tearing up a piece of paper *mixing salt and water ------------------------------------------------------------------------------------------------------------
*change in color(i.e. leaves in the fall) *change in temperature *change in smell or taste *change in color *smoke is produced Examples of Chemical Changes *burning toast *frying an egg *mixing baking soda and vinegar *a nail rusting |
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