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In the Why is the Water Green? Pollution Laboratory Kit for environmental science, examine the effects of common pollutants on an organism that is abundant in all aquatic environments—algae.
Examine the effects of common pollutants on an organism that is abundant in all aquatic environments—algae! Simulated fertilizer run-off containing nitrates and phosphates is added to locally collected algae-rich pond water or to purchased algae cultures. The amount of growth is compared against control samples without adding nutrients. Students also examine the algal cells using a microscope and record cell counts. After completion of this activity, students will understand how fertilizer run-off leads to algae blooms and why nitrate and phosphate pollution is an important environmental concern.
Enough materials provided for a class of 30 students working in pairs. Desmids cultures are requited and available separately.
Materials Included in Kit:
Ammonium phosphate solution, 0.1 M, 100 mL
Bristol’s algae media, concentrate, 100x, 100 mL
Sodium nitrate solution, 0.1 M, 100 mL
Cover slips, plastic, 18 mm x 18 mm, pkg/100
Microscope slides, glass, pkg/72
Pipet, Beral-type, wide stem, 60
Vial, snap-on cap, clear plastic, 50 mL, 40
HS-LS2-4. Use mathematical representations to support claims for the cycling of matter and flow of energy among organisms in an ecosystem.
