B4 We produce drinking water (student instructions)
Experimentation instructions for Experimento | 10+:
Detailed instructions and questions for students on conducting the experiment "We produce drinking water – Methods of purifying water". This experiment comprises three subexperiments.
• Rough purification of contaminated water with silica sand, activated carbon, and filter paper
• Fine purification of water with membrane filter
• Fine purification of water with hollow fiber membrane filter
For each subexperiment, the students are first provided with an overview of the materials to be used and safety information. This overview is followed by the detailed, step-by-step instructions for conducting the experiment. Afterwards, the students are asked to note their observations. Specific questions are used to guide the students as they analyze the results of the experiments. At the end, the students are asked probing questions related to the experiment (an answer sheet is available for teachers).
• Observe the safety information in the instructions as well as the applicable safety guidelines for your school and discuss it with your students.