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Science - Biology
Standard 2 Objective 1
3 class periods of 60 minutes each
Students will design and perform an experiment related to the properties of organic substances. The lab can be quite extensive or relatively short in duration depending on the number of substances tested and the number of tests desired by the teacher.
Time Required: Variable, one period needed for students to design lab and one or two more periods depending on the amount of tests.
Note to Teacher:
This lab is written with an inquiry approach. If more structure is desired, add a list of materials, write the procedure by providing procedures for each test youd like the students to perform and put headings on the data table.
Heating the substances is a good property to test but does involve some risk. Hot plates work best but are often in limited supply. If open flame is used, care should be taken to use small quantities of substances in heat resistant glassware. Oil may spatter and can create fire hazards. Students may be asked to bring substances from home to test if desired. The types of properties students may test for include:
Students should know what organic substances are and what a property is. They should be familiar with safety practices in the lab and basic experimental techniques.
1. Students identify three tests for properties of organic substances .3 pts
2. Students make correctly stated hypothesis ............. 2 pts
3. Procedures are clearly written .......... ..10 pts
4. Data collected and recorded on 4 food types 10 pts
5. Analysis questions answered correctly .7 pts
6. Conclusion accurately drawn .3 pts
Answers to Analysis questions:
Lesson Design by Jordan School District Teachers and Staff.