S compare symptoms of several waterborne diseases.
S analyze the characteristics of environments that promote the transmission of the diseases around the world. Make sure the order of Symptom Cards is different for envelopes containing the same diseases. Making Connections Students may remember news stories about contaminated water causing disease or recall camping when they purified lake or stream water by boiling it. Some students may know that waterborne diseases are the number one killer of children worldwide. Learning about all the diseases that could be contracted through contaminated water helps students gain an appreciation for clean drinking water.