Fertilizers and pesticides applied to farm fields in pennsylvania have made their way down into the chesapeake bay in maryland. this is an example of pollution.

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

There is a liquid capsule inside a cup full of liquid. the cup full of liquid has salt in it and the liquid capsule has no salt in it. in which direction will the solvent flow? a. the salt does not have to move b. from the capsule to the larger cup c. equally between the capsule and the cup d. from the larger cup to the capsule