A new housing development gets built on the other side of the lake. Within one year, the once clean lake is full of algae and dead fish are washing up on your beach. The dissolved oxygen levels in the lake are much lower than they were the year before when your development was the only one on the lake. Based on what you’ve learned in this unit and part of this assignment, what is the other housing development doing wrong?

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.