Today’s Agenda… Flashback Discuss Physical Changes at Home

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Presentation transcript:

Today’s Agenda… Flashback Discuss Physical Changes at Home Notes on Chemical Properties and Changes Venn diagram to compare physical and chemical changes Letter to a friend

Chemical Properties and Changes Study Pack #7

Today’s Goals… I can describe a substance using its chemical properties I can describe a chemical change I can compare physical and chemical changes

Chemical Properties Can only be observed while the object is changing into a NEW substance

Examples: Flammability (ability to burn) Ability to rust Ability to tarnish

Chemical Changes Result in a NEW substance Not easily reversed

Examples: Wood burning Iron rusting Silver tarnishing Cooking/Baking Foods spoiling Leaves changing colors in the fall

Signs of Change How do you know a change has occurred? Gas bubbles Production of heat, light, smoke Change in color Sound

Assignment Write a letter to a friend describing the difference between a physical and chemical change! Don’t forget to give an example of each.