Getting a start on graphing the salt level data.
What is the best way to represent the data in order to compare different data sets?
Finding differences that make a difference.
What happens on land affects water.
Each city has its own water supply, but different water supplies can be affected by the same factors.
Pollutants reach water sources through runoff.
Water in our homes originates in nature.
Some organisms are more sensitive to changes in salt than others.
What appears to be very little salt can cause big environmental changes like changing freshwater to saltwater.
Students learn about the impact of salt in various ecosystems.