Environment > food

All of these techniques involve a long-term project – prepared in one lesson, left for about a month (see Note 2), then with results gathered in one or more lessons after that time. There is scope for focus on the scientific methods involved in planning, controlling variables, collecting and analysing data, as well as on the biology of plant nutrient requirements. The methods include several different dependent variables – percentage

Investigate the effects of cellulose-digesting enzymes in microbes on different kinds of paper. This long-term activity allows students to explore the role of microbes in decomposing organic waste and their place in the carbon cycle.