Price tags for filter materials for Lesson 6 of Operation Water Pollution. Price tags for 2 litre pop bottle, 1 cup fine sand, 1 cup coarse sand, 1 cup fine gravel, 1 cup coarse gravel, 1 cup activated carbon, 1 cotton ball/piece of cotton batting, 1 piece of cheese cloth/coffee filter, 1 rubber band, and 1 clear cup.
1. Was there any difference in the water for each group before it was filtered?
Yes there was: the urban communities rely on having good source water (fairly clean, little to no contaminants). The rural and aboriginal communities often get what the urban communities don’t want and therefore they often have poor quality source water.
