STANDARDS

S8P1. Students will examine the scientific view of the nature of matter.
d. Distinguish between physical and chemical properties of matter as physical (i.e., density, melting point, boiling point) or chemical
SPS2.a Calculate density when given a means to determine a substance's mass and volume
SCI.9-12.PS.SPS6 Students will investigate the properties of solutions: (conductivity)

ASSESSMENTS:
UNIT TEST August 23
PBL solution due:
homework assignments: check the blog daily

STUDY GUIDE FOR TEST:

Jeopardy review game



Problem for this Unit:





Template for students solution: Unknown Substance Analysis Report


DAILY ASSIGNMENTS
Mon Aug 8
PBL: Physical & Chemical Properties
HOOK:



  1. Introduce the problem to the students using the PPT presentation above. Students will be working in groups of 4-6. The first slide of the PPT shows the Engineering Design Process we will use to solve the PBLs. Briefly discuss the process and then show how it is used as steps #1 (Define the Problem) and #2 (Brainstorm) as the problem PPT is reviewed. It will also help to define items that need to be addressed in #3 (research).
  • What's the problem? (Define the Problem)
  • Record: What do we already know? (Brainstorm)
  • Record: What do we need to know? (Brainstorm)
2. Large group discussion regarding : What do we know? (Have kids maintain a list or post on PBL wall)
3. Generate a list of questions regarding: What do we need to know? (They should reflect on the problem statement as well as the presentation of the solution in order to generate these questions) Create one page per question in the notebook (This is the basis for the research for the problem.)

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Tues - Wed 8/9-8/10-
Thurs. 8/11

1. Start research using textbooks. Have students read pages 38-47 and 50-51 in their texts (these pages reference physical & chemical properties. Conduct class discussion of these properties.

2. Provide students with the substances that the security training officers have indicated the test substance will come from.
powders: baking soda, baking powder, baby powder, cornstarch
liquids: water, isopropyl alcohol, salt water, hydrogen peroxide
metals: copper, aluminum, steel, stainless steel
Have students make observations of all the substances and identify the physical and chemical properties of each (using their research notes). They will use this information for the certification test. They should use the their notes from reading textbook pages 38-47 & 50-51 as well as research notes to make sure that they cover all of the physical & chemical properties.

Any properties that they cannot identify must be researched on the Internet.

Make sure that they include: magnetism, solubility, electrical conductivity
HOMEWORK TUESDAY 8/9: List some physical & chemical properties of one food item you eat for dinner tonight.

Homework Thursday:
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Fri 8/12-Mon 8/15-Tues 8/16

1. Identifying the white powder (lab grade):
Certification Training mystery powder lab HS.docx
Certification Training mystery powder lab HS.docx

Certification Training mystery powder lab HS.docx



Make sure that the students use their phones to take pictures of the evidence and the lab results. These pictures should be used in their Unknown Substance Analysis Report
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Wed 8/17
1. formative assessment
2. Identifying the metal

Provide students with samples of the metals. Have them refer to their notes and discuss the physical properties and use this information to identify the sample of the unknown metal found at the crime scene.

  • have them measure and calculate the density of each metal and compare the findings to that of the unknown metal
  • have them compare them using magnets (remind them to take pictures/video for presentation)
  • have them make a predicted identification

2 Have the students reference their notes on the chemical properties of the metals

  • ask how they could use these properties to identify the unknown metal
  • set up demo of how to test for oxidation (you should have a sample ready of each of the metals rusted or not)
  • show video clip of rusting
  • have them use this information to identify the unknown metal





Review density of liquids

http://phet.colorado.edu/sims/density-and-buoyancy/density_en.html

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Thurs 8/18
Identifying the liquid**
1. (provide students with samples of the evidence (water, alcohol & hand clear hand sanitizer). Have students access their notes/graphic organizer on the physical & chemical properties of the possible evidence. Discuss the physical properties first and have the students note the similarities and differences. Have them note and record those physical properties that best help them to narrow down and possibly determine which of these physical properties is/are used to differentiate between the unknown and the known substances.

2. Discuss density as a physical property of matter and how it can be used to differentiate between similar substances.
    • students should calculate the density of each of the liquids anc compare the unknown to the known

2. Have them refer again to their notes and discuss the chemical properties that they researched.
    • Ask them how they could use chemical properties to identify the unknown liquid evidence
    • Ask them to explain how these properties could be tested
    • DEMO: test the flammability of each of the liquids (use pie tins) The students should take pictures/videos of this to use in thier presentations (use proper safety precautions.
    • use ground beef to test hydrogen peroxide
    • have them test for electrical conductivity

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- Fri 8/19- Mon8/22
Friday : quiz

We got our Powder ID lab back and if you made lower than a 70, you may take advantage of this grade recovery opportunity:


Work on Unknown Substance Analysis Report:

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Mon 8/22

warm up: show this video clip about relative density:
https://www.youtube.com/watch?v=4EMUsPJtCoc
2. Density Lab:
A. each of the lab groups will determine the densities of the following liquids
  • shampoo, antifreeze, syrup, corn oil, dish detergent, water
B. They will then predict where these liquids would settle when poured into a small graduated cylinder
  • test their predictions (demo)
  • discuss the concept or relative density
  • (demo)various solid objects in water : wood, metal, pumice rock. Provide students with the density of the solid objects and ask them where they think they will settle when placed into the liquids.
  • discuss how density can be a great way to use physical properties to differentiate between similar substances


3. QUIZ: iRespond: physical & chemical properties & matter. .




Academic adjustment:
(Student result reports can be printed from iRespond that will list the remediation for any missed questions.)
PP & CP REVIEW Have those students with less than 100% on the i Respond quiz work on the website. They only need to complete the section on physical & chemical properties.
matter remediation: read pages 38-42 in text

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Tues 8/23

Review for test
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Wed 8/24
TEST




Thurs 8/25
Pretest