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Evaluation of Laboratory Science CoursesName of course:Environmental ScienceDuration of study:SemesterTextbook title and copyright date:In house textbook created from open resources.Approximately how many hours per week do students spend conducating hands-on l aboratoryexperiments i n this course?1 hour (20% of instructional time)Please provide a l ist of the l aboratory experiments or projects you do that require manipulationof equipment.Soil Type LabEgg Plate Tectonics LabWater Use LabTrash LabEnergy Use LabList all l ab equipment used; i ncluding but not l imited to household i tems (for example;microscopes; beakers; ramps; dissection equipment; etc.)Different types of soil (loam; clay; dirt; sand; etc.)Hard boiled eggsColored markersGraduated cylindersWater output measuresCollected garbage for a dayElectronic balanceDifferent types of light bulbsElectric meterUsing standard Scientific Method outlined by the following questions; describe typical l aboratoryassignments associated with this course.State the problem or concept i nvestigated during this l aboratory assignment. (Do orangesstored i n a refrigerator have more Vitamin C than oranges picked fresh from a tree?) Formulatea hypothesis for this problem using Ôf/then?statements. (If oranges picked fresh from a treehave more Vitamin C; then j uice from these oranges will take l onger to turn a starch solutionblue.)Garbage Lab - Does the amount of garbage produced decrease when students arechallenged to be a responsible recycler?Garbage Lab - If a student is asked to be a more responsible recycler; then theywill produce less garbage during a day then a student who is not.Describe the experiment you performed to prove or disprove your hypothesis. List all essentialmaterials. Describe each step you performed i n the experiment.Students are provided a garbage bag and no instruction on recycling.1. Collect all your disposable garbage for 24 hours.a. Garbage bag2. Separate and categorize your garbage into self identified groups.3. Measure and record the mass of each group.a. Electronic balance4. Calculate the percentage of each group.Students are provided a garbage bag after instruction on recycling.5. Repeat steps 1-4. Use the same categories as you did before.6. Calculate the change in mass between the two events.Describe the results of your experiment or study. Use graphs and charts where appropriate.Explain your data or results. Give an analysis of your experiment.After receiving instruction on recycling; the student produced only half as muchof garbage as the same student did before receiving recycling instruction.Almost each category decreased; but by different amounts.Write a conclusion for your study. Was your hypothesis supported or refuted?Before receiving instruction on recycling; this student produced 1000g ofdisposable garbage. The majority of it came from food waste (63%). There werenoticeable amounts of plastics; papers; and metals which are all recyclablematerials. After receiving instruction on recycling; the student produced half asmuch garbage. There was still a significant amount of food waste (80%). Afterinstruction the food waste percentage actually increased but this is due to the factthat overall less garbage was produced. Recycling instruction was less focusedon healthy food choices versus the materials used to collect and serve the food.In the recyclable product categories; there was a decrease in both mass andpercentage of the garbage produced within these categories. This data supportsthe hypothesis that after receiving instruction on recycling that a student doesproduce less garbage. Further investigation may include finding the effects offood waste production through the use of healthy eating instruction.

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Approved

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• LINT
• Integrated science

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Online / Virtual