Chapter 2: Q11. (page 105)
Earth Science The table shows the year-to-year changes in the mean January water level of Lake Superior during the period 1997–2001. Positive changes represent increases in the water level, while negative changes represent decreases. In 2001, the water level was 182.98 meters. What was the water level in 1997?
1 Find the overall change in the water level from 1997 to 2001 by adding the changes in the table.
2 Write an equation that you can use to find the water level in 1997.
3 Solve your equation. What was Lake Superior’s water level in 1997?
Short Answer
1. Overall change in water level from to .
2.Equation to find water level in is .
3. Water level in is meters.