In this activity, Grade 7A students raised their awareness of the critical use of chemistry to provide one of the most basic human needs, clean drinking water. Starting with local natural surface waters, Grade 7A students in Shajara School replicate the main steps of drinking water treatment and observe disinfection done by their teacher.
During the preparation and discussion of the experiment, Grade 7A students in Shajara School are learned to treat water from a natural local source in science lab. They also carried out water treatment: Aeration, Coagulation, Sedimentation and Filtration as home activity. The last step-Disinfection- is done by teacher for safety measures.
For safety measures, students observed disinfection done by teacher
The following information is submitted to the database:
Date sampled: 2/12/2011
Local water source: Al-Qasmiye River
Drops of bleach required to 500 ml water: 39
Nature of water: Fresh (fresh, salt, estuarine, marine, etc.)
Temperature: 12 oC (temperature when water collected)
File names for water sample photos Purification_shajara
Class name and number of students Grade 7A – 26 students