This YouTube activity really gets your students thinking creatively. A short film is played for the students, but they can’t see the scene, they can only hear it. Students guess what happens in the scene before they get to view it to check their deductions. Students are motivated and have lots of fun. This activity can be used to review present simple tenses, vocabulary for sounds, language of deduction and making comparisons.

Objective of the activity is to determine the quality of water samples of different sources using chemical and microbiological indirect methods. The action has planned activities in the laboratory of Chemistry with the determination of the presence of the organic substance, as an indicator of contamination, through the method of Kubel and in the laboratory of Microbiology with the determination of Total Coliforms with MPN method.