LESSON 2 Physical & Chemical Changes!
CHANGES IN MATTER
- matter can undergo many changes
- nearly all changes can be broken down into 3 categories
- physical changes
- chemical changes
- nuclear changes
PHYSICAL CHANGES
- involves changing shape or state of matter (crushing, tearing, etc)
- no new substances are formed (eg. boiling water, cutting wood, smashing cars)
- changing from a solid to a gas can often be confused as a chemical change
- chemicals remain the same
- during this melting process, chemicals usually follow this path:
ENERGY INPUT VS. TEMPERATURE
CHEMICAL CHANGES
- new substances are formed
- properties of the matter change
- conductivity, acidity, etc.
- eg. iron rusting, burning wood, digesting food
~ Kimberly Nipp
posted by chemistry11 @ 11:06 PM
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