This document summarizes a STEM lesson on water pollution conducted by the 14th Primary School of Rethymno in Greece. The students in the B'3 class were assigned a mission by WEAF to check the river Platanias for water pollution. Following the scientific method, the students made hypotheses about potential water pollution in the river, suggested solutions, and planned an investigation. They visited the river to take water samples and test the color, smell, texture and filtered the water. After analyzing their results, the students concluded their findings and sent a letter back to WEAF.
This document provides a list of materials needed for an experiment involving a letter in a bottle, including a letter, materials for the scientific method, various containers, water, filters, gloves, and observation sheets. An annex section lists additional documents related to a letter in a bottle experiment and the scientific method.
