September 5, 2018 Warm Up: Take out data collection sheet from Friday’s Lighthouse Diamond Lab Use information sheet to complete data table Review your “Hot Suspects” list Homework: USA Test Prep & online textbook work due Friday.

Physical vs Chemical Properties Physical properties can be observed without changing the identity of the substance They include size, color, texture, solubility, malleability, ductility, conductivity, and magnetism Chemical properties are observed by how a substance reacts with another substance This changes the substance chemically They include reactivity, combustibility and flammability

Sugar Small crystals Melts over heat (turns brown, then black) Dissolves in water Does not react to vinegar or iodine

Salt Small crystals Does not melt over low heat Dissolves in water Does not react with vinegar or iodine

Flour Fine powder Will brown and then burn over low heat (may smell like burnt toast) Will not dissolve in water Reacts to iodine by turning purple or black Does not react to vinegar

Cornstarch Fine powder Will brown and then burn over low heat (may smell like burnt popcorn) Does not dissolve in water Reacts to iodine by turning purple or black Does not react to vinegar

Plaster of Paris Fine powder Little reaction to low heat (may turn gray) Does not dissolve in water Does not react to vinegar or iodine

Baking soda Fine crystals/powder Does not react to low heat Dissolves in water Does not react to iodine Reacts to vinegar with bubbling and fizzing

Next Steps Identify your six mystery powders, A – F Identify the thief's mystery powder Using the clues from the “Hot Suspects” list and the evidence from your data table, determine who stole the Lighthouse Diamond Complete your affidavit with a claim of who is guilty, evidence that supports this claim, and reason that your group believes this person is guilty Make sure you mention physical & chemical properties to test the thief's powder! Turn in the completed data table and the affidavit when complete

September 5, 2018 Warm-Up: Use the first 15 minutes of class to finish your insulating box Be sure to clean-up after yourself! Mystery items will be placed in boxes in 15 minutes Work will be returned while you are working – keep it out for review Homework: Study for test. Chapters 5 & 14 in the online textbook. Complete online assignments (textbook & USA Test Prep) by Friday (may need to upload when through).

Test Standards: SPS5. Obtain, evaluate, and communicate information to compare and contrast the phases of matter as they relate to atomic and molecular motion. a. Ask questions to compare and contrast models depicting the particle arrangement and motion in solids, liquids, gases, and plasmas. b. Plan and carry out investigations to identify the relationships among temperature, pressure, volume, and density of gases in closed systems. SPS7. Obtain, evaluate, and communicate information to explain transformations and flow of energy within a system. b. Plan and carry out investigations to describe how molecular motion relates to thermal energy changes in terms of conduction, convection, and radiation. c. Analyze and interpret specific heat data to justify the selection of a material for a practical application (e.g., insulators and cooking vessels). d. Analyze and interpret data to explain the flow of energy during phase changes using heating/cooling curves

Returned work Phase Change GIZMO – previously reviewed Gas Law GIZMO – previously reviewed Radiation Lab Specific Heat Lab – previously reviewed Gas Law quiz Specific Heat quiz

Radiation Lab The black can should’ve heated up AND cooled off more The primary type of heat transfer we observed was RADIATION (there was no contact between the lamp & the cans The black can absorbed more heat and the silver can reflected more This was NOT about conductors and insulators Best reasons connected the claim and evidence with the science idea that black absorbs more heat than silver.

Specific Heat Quiz Some partial credit was given

3-2-1 Reflection – complete sentences Tell me THREE items you chose for your box and why. Tell me TWO changes you would make if you did this again Tell me ONE thing you learned about heat transfer in doing this activity Draw a diagram illustrating heat transfer between your ice cream sandwich and the air in the room