“Where are Environmental Hazards?”
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DAY 9-10: AIR POLLUTION (FOSSIL FUEL DENSITY COMPARISON LAB AND DISCUSSION OF FOSSIL FUEL DENSITY COMPARISON LAB REPORTS)
Here the students will determine the densities of coal and petroleum oil, compared to that of water, by determining each mass in gram units with a balance beam, by determining the liquid volume in milliliter units with a graduated cylinder, or by determining the solid volume in milliliter units by water displacement in a graduated cylinder. After the measurements are taken, the students can then use the formula D=M/V to calculate their densities. Next, the students can calculate their percentage error by using the formula PE=(OBSERVED VALUE - EXPECTED VALUE) / EXPECTED VALUE. Students will need to write a lab report also.