Class will begin with students responding to the ChemCatalyst embedded in the Lesson 02 PowerPoint. Next, students will observe a demonstration in which a copper penny first turns silver, then gold. They will record observations in the Lesson 02 Student Worksheet. A video of the demonstration is available below:
After completing the lesson, students should be able to explain what chemistry is, to explain the difference between a physical and chemical change, and to explain how scientists use testable hypotheses to construct experiments.
Homework for this evening:
- Work through the homework problems at the end of Lesson 2 and then verify accuracy with the Lesson 02 Homework Answers.
- Read Lesson 3 in the textbook.
- Write notes for Lesson 3 on the Chapter 01 Notes handout.
- Come to class tomorrow prepared to ask questions about anything you read in lesson 3, or homework problems from lesson 2 you did not understand.
- Return signed copy of syllabus (due no later than Friday).
- Return signed copy of student safety contract (due no later than Friday).
- Research the chemical composition of United States coins, including the nickel, dime, and quarter. Given what you learned in the penny lab today, is it possible to turn any of those coins into a different color?
- Research metal alloys. Today we learned that copper and zinc can combine to make brass. What other metal combinations produce useful alloys?
- Use the library or the Internet to research the development of alchemy in one of these regions: China, India, the Middle East, Greece, Spain, England, or Egypt. Write a two-paragraph essay on the history of alchemy for your chosen region. Be sure to list your sources.
- Use the library or Internet to research common uses for sodium hydroxide, which is also called lye.