Activities Select activities that are most appropriate for your lesson plan or add your own. You can also encourage students to identify key issues in the preceding extract and devise their own questions or topics for discussion. Find out more about spectrophotometry and how it is used to determine chlorophyll concentrations. Read these two articles and write a short essay on the Culture Collection. Include how the Culture Collection is used.
Students record the growth of algae in four different types of water.
Students determine the effects of oil, detergent, copper sulfate, and lawn fertiliser on algal growth. Chromatography Uses paper chromatography to separate the pigments in water-soluble pen markers and in a leaf extract. Students determine chloroplast numbers using a haemocytometer. Chlorophyll content Students determine chlorophyll content using a spectrophotometer.