Transcript Chemical and Physical Changes Lab

Chemical and
Physical Changes
Lab
 Objective
 Today I will be able to:

Differentiate between a physical and chemical change by recording
observations in the lab
 Informal assessment – monitoring group interactions as they complete
the lab
 Formal assessment – analyzing student responses to the exit ticket and
lab questions
 Common Core Connection
 Value Evidence
 Reason abstractly and quantitatively
 Use appropriate tools strategically
Lesson Sequence
 Evaluate: Warm-Up
 Explain: Lab Safety
 Explore/Elaborate: Chemical and Physical Changes Lab
 Evaluate: Exit Ticket
Warm - Up
 What is the difference between a physical and chemical
change?
 What evidence of a chemical change will I look for in the
lab today?
 Read over the procedure for the lab today on your desk
Objective
 Today I will be able to:
 Differentiate between a physical and chemical change by
recording observations in the lab
Homework
 Finish answering lab questions
Agenda
 Warm-Up
 Lab Safety
 Chemical and Physical Changes Lab
 Exit Ticket
Chemical and Physical Changes
Lab
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 of all chemicals in the waste container, DO NOT pour directly down
the sink
 When you finish, return the lab area to its original state and begin working on
the lab questions
Exit Ticket
 On the board, write the experiment that you had the most
difficult time determining whether it was a chemical or
physical change