Chemical and Physical Reactions

Physical and Chemical Changes

Physical Changes

• When matter changes physical states

• Can be reversed, like sorting a bag of Skittles

• Change where nothing new is made

• Ice can change to water, and water can change to ice

• Cutting, bending, melting, dissolving, mixing,

Chemical Changes

• A chemical change occurs when two or more materials are combined to make a brand new substance

• That change CANNOT be reversed

• Lemon and Baking soda, for example

• There can be changes in odor, color, heat,

• When you burn wood for a camp fire, you can't "unburn" the wood

Multiple Choice

Water changing from ice to liquid.

• Chemical change

• Physical Change

Multiple Choice

Baking soda and vinegar

• Chemical Change

• Physical Change