Which of the following are sources of extra nutrients that can cause algae to overgrow in water due to HUMAN activity? CAREFULLY select all options that apply. List the answers. dissolved oxygen in water

treated waste water

viruses

combined sewage overflow (CSO)

fertilizers

cleaning products

dog poop on the streets of NYC

water running over rocks

(This is 7th grade science)

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.