Chem vs. Phys Change Mentos and Coke

Common Core Connection Objective Today I will be able to: Construct an effective argument by watching a demonstration Differentiate between a chemical and physical change Apply proper technique to lighting a bunsen burner Informal assessment – monitoring student interactions and questions as they complete the practice and construct their arguments. Formal assessment – analyze student responses to the exit ticket, argument writing and practice Common Core Connection Build Strong Content Knowledge Reason abstractly and quantitatively

Lesson Sequence Evaluate: Warm Up Evaluate: Review Chemical vs. Physical Changes Practice Engage: Mentos and Coke Demonstration Elaborate: Argument Writing Engage/Explain: Bunsen burner lighting Evaluate: Exit Ticket

Warm-Up Identify as a chemical or physical change/property A match lights when struck Wood is placed into a chipper A lump of gold is pounded into a large, thin sheet Baking powder bubbles and gives off CO2 when it is moistened A pan of water boils on the stove Hydrogen Sulfide gas causes silver to tarnish

Objective Today I will be able to: Construct an effective argument by watching a demonstration Differentiate between a chemical and physical change

Homework Wear closed toe shoes for lab tomorrow

Agenda Warm Up Review Physical and Chemical Changes Practice Mentos and Coke Argument Writing Bunsen Burner Lighting Practice Exit Ticket

Review Chemical and Physical Changes Practice What questions do you have about the practice?

Mentos and Coke Demo

How to Construct an Effective Argument State a claim Use evidence to back up your claim Create a counterclaim with evidence Use specific examples!

Bunsen Burner Demonstration and Practice Watch Mr. Klotz’s Demo and Follow his instructions

Lab Safety – Lab Preview Closed toe shoes, goggles, aprons must be worn to participate Hair must be tied back Review Bunsen burner safety In step 3, DO NOT stare directly into the light HCl, sodium chromate and barium nitrate are in a low concentration, if you spill it just rinse it off of your skin in a sink Dispose most of the yellow mixture in a large beaker and rinse with a lot of water Do the dame with the HCl and Mg

Exit Ticket Draw a sample that has two elements and two compounds. Does your picture represent a pure substance or a mixture?