Chemical vs. Physical Change. Physical Change. Any process involving a substance changing from one state of matter to another without altering the chemical composition. These changes are often considered ‘easy’ to undo. Ex. Ice melting, water boiling, sugar dissolving. PhysicalChange1_Part1.
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A change that occurs when one or more substances are changed into a new substance.
These changes cannot be reversed.
Some observations that occur during a chemical change are: color, fizzing, precipitate (solids forming), heat change (hot or cold).
(Typically, the more time, amount of substance, and slower rate….. The larger the crystals will be.)
In the Sense-ational Activity you will be conducting an experiment to test your skills of observation.
In the first part of this experiment, you will be observing 5 white powders with each of you senses.
In the second part of this experiment, you will be observing how each of these powders reacts (chemically / physically) when mixed with various solutions.
Your ability to observe with all of your senses will be tested.