1.
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Initiate a discussion by accessing knowledge of previous lessons asking students to define matter and density. Introduce the day's topic Physical and Chemical Properties of Matter. Instruct students that all matter has certain properties some are physical and some are chemical. Physical properties are used to describe matter. Ask students "What do you think would be a physical property of a blackboard eraser?" Emphasize that physical properties describe matter
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2.
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Matter also has chemical properties. Chemical properties are observed through chemical reactions. Chemical reactions result in a new product being formed; something happens to change the chemical make-up of the reactant to produce a new product or products
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3.
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Ask students if the following items listed represent a physical or chemical change and ask why or how they made the choice.
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Fireworks (chemical)
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Melting butter (physical, it is still butter just in a different state)
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Carving a design in a wooden block (physical, still wood)
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White coating on aluminum lawn furniture (chemical the outside of the aluminum reacted with the air to form a coating)
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Rusty nail (chemical, the iron in the nail reacted with the air to form rust)
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Evaporation (physical, still water just is in the form of a vapor)
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Getting a hair cut (physical, still hair)…coloring your hair (chemicals are used to alter the color of your hair)
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Foliage (chemical)
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4.
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Reaction in the kitchen, let's look at what we do when we make monkey bread, which steps are physical changes and which are chemical?
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First, melt ¾ cup butter
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Next, mix 1 tsp. cinnamon with ½ cup white granulated sugar place in a large food storage bag
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Cut up two packages of refrigerated cinnamon rolls (not cooked)
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Toss the cut up roll pieces in the bag with cinnamon & sugar mixture
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Once coated place pieces into a buttered bunt pan
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Add 1 cup of brown sugar to the melted butter
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Pour the melted butter & sugar mixture over the top of the coated roll pieces
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Bake at 350 degrees Fahrenheit for 30 minutes
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