In this investigation, students will take a live sample of bacteria (algae) found in water samples. Some bacteria is healthy but too much will lead to eutrophic water bodies. Your investigation will observe the growth of algae within a controlled body of water using an independent variable such as pH, temperature, UV spectrum, salinity or nutrient content. Students may study the dissolved oxygen over time or turbidity over time. A proper discussion will include the extension into Hong Kong water pollution.
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