Chemical and Chemical and Physical Physical

Changes LabChanges Lab

ObjectiveObjective Today I will be able to:Today I will be able to:

Differentiate between a physical and chemical change by Differentiate between a physical and chemical change by recording observations in the labrecording observations in the lab

Informal assessment – monitoring group interactions as Informal assessment – monitoring group interactions as they complete the labthey complete the lab

Formal assessment – analyzing student responses to Formal assessment – analyzing student responses to the exit ticket and lab questionsthe exit ticket and lab questions

Common Core Connection Common Core Connection Value EvidenceValue Evidence Reason abstractly and quantitatively Reason abstractly and quantitatively Use appropriate tools strategicallyUse appropriate tools strategically

Lesson SequenceLesson Sequence

Evaluate: Warm-UpEvaluate: Warm-Up

Explain: Lab SafetyExplain: Lab Safety

Explore/Elaborate: Chemical and Physical Explore/Elaborate: Chemical and Physical Changes LabChanges Lab

Evaluate: Exit TicketEvaluate: Exit Ticket

Warm - UpWarm - Up

What is the difference between a physical What is the difference between a physical and chemical change?and chemical change?

What evidence of a chemical change will I What evidence of a chemical change will I look for in the lab today?look for in the lab today?

Read over the procedure for the lab today Read over the procedure for the lab today on your deskon your desk

ObjectiveObjective

Today I will be able to:Today I will be able to: Differentiate between a physical and chemical Differentiate between a physical and chemical

change by recording observations in the labchange by recording observations in the lab

HomeworkHomework

Finish answering lab questionsFinish answering lab questions

AgendaAgenda

Warm-UpWarm-Up

Lab SafetyLab Safety

Chemical and Physical Changes LabChemical and Physical Changes Lab

Exit TicketExit Ticket

Chemical and Physical Chemical and Physical Changes LabChanges Lab

Lab Safety – Lab Lab Safety – Lab PreviewPreview

Closed toe shoes, goggles, aprons must be worn to Closed toe shoes, goggles, aprons must be worn to participateparticipate

Hair must be tied backHair must be tied back

Review Bunsen burner safetyReview Bunsen burner safety

In step 3, DO NOT stare directly into the lightIn step 3, DO NOT stare directly into the light

HCl, sodium chromate and barium nitrate are in a low HCl, sodium chromate and barium nitrate are in a low concentration, if you spill it just rinse it off of your skin in a concentration, if you spill it just rinse it off of your skin in a sinksink

Dispose of all chemicals in the waste container, DO NOT pour Dispose of all chemicals in the waste container, DO NOT pour directly down the sinkdirectly down the sink

When you finish, return the lab area to its original state and When you finish, return the lab area to its original state and begin working on the lab questionsbegin working on the lab questions

Exit TicketExit Ticket

On the board, write the experiment that you On the board, write the experiment that you had the most difficult time determining had the most difficult time determining whether it was a chemical or physical whether it was a chemical or physical changechange