Mrs. Vigue’s Scientific World

Ch5_Fiber_x Ch5_Glass_x Ch5_Hair Evidence_x These are the powerpoint presentations available for the sections in this unit for you to review! Let me know if you have any questions!

Today in class, students received back graded work.  A review outline pertaining to trace evidence was passed out and we used the wipe-off boards to practice parts of the content for the upcoming assessment.  The second part of class was spent learning about the different classes of drugs.  Students broke up into groups to become experts in each area and created handouts to share with the rest of the class.

Homework:  Review for the assessment next class.

Today in class, students turned in their limiting reactant packets for feedback and took a quick quiz on stoichiometry.  When finished, students began to work on the Stoichiometry Challenge lab in groups.

Homework:  Write the lab report based on the rubric provided.  Be sure to follow all points outlined.  We will go over questions about limiting reactants on Friday and then there will be new content covered on gases on Friday.  The stoichiometry quest will be given on Tuesday.

Today in class, students turned in their Molar Mass by Freezing Point Depression Lab and took a solutions quiz.  When finished, additional practice problems were given from the packet in preparation for the test to be given. #28,36,42,59,60,70,72,82,92,94.

Homework:  Complete review problems, review for the test and seek help as needed.

Today in class students received back grade work and began the analysis of their soil samples from home according to the following guidelines:

Soil Analysis

Homework:  Students should write a discussion of the data collected, discussing what interesting things they learned about their samples and what the test results showed.  Students should absolutely refer to their test results in the course of the writing and compare their sample to an unknown.

Today in class, students turned in their limiting reactant packets for feedback and took a quick quiz on stoichiometry.  When finished, students began to work on the Stoichiometry Challenge lab in groups.

Homework:  Write the lab report based on the rubric provided.  Be sure to follow all points outlined.  We will go over questions about limiting reactants on Thursday and then there will be new content covered on gases on Thursday.  The stoichiometry quest will be given on Monday.

Today in class, the Chemistry of Airbags assignment was checked and discussed as a group. Notes and examples were given dealing with limiting reactants.  We used the equations from the airbags as examples.  Students were given a new packet to practice with the concept.

Homework:  Complete all of the limiting reactants examples. Review for a quiz on Stoichiometry.

Today in class, the homework problems were checked and an answer key was provided for checking over answers.  Students then collected data for the Molar Mass by Freezing Point Depression Lab.

Homework:  Complete lab questions as needed

Today in class, students turned in their fiber conclusions.

Today in class, students viewed a powerpoint presentation about glass trace evidence.  We discussed different types of glass and how glass can be class or individual evidence.  Students then performed two tests on glass samples, refractive index and density.

Ch5_Glass_x powerpoint presentation

• Homework:  Write  a discussion for your glass data which should include the following:
• What happened when each of the pieces of glass were placed in the canola oil and why?
• What is your response to question #3?  Be sure to compare the Known samples, and then discuss the questioned source.
• Discuss densities of glass pieces collected by you and your classmates.  Were they alike or different?  What was the range in values?  What was the average value? Explain why there may be inconsistencies in the data.

Today in class, the Chemistry of Airbags assignment was checked and discussed as a group. Notes and examples were given dealing with limiting reactants.  We used the equations from the airbags as examples.  Students were given a new packet to practice with the concept.

Homework:  Complete all of the limiting reactants examples.

Today in class, we checked and went over one of the examples from homework.  Students conducted peer notebook checks for the last unit.  Students broke up into lab groups to investigate stoichiometry as it relates to airbags.

Homework: Complete lab questions