Electrical power plants are the main contributor of what? mercury poisoning
sulfur dioxide pollution
oxygen pollution
thermal pollution

How air particles exert a pressure on the inside of the balloon

Which characteristics can be used to differentiate star systems? check all that apply.

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?