During the drinking water treatment process, a chemical is added at the stage so that suspended particles, such as mud and sediment, will stick together, settle out, and can be removed. a.aerationb. chlorinationc. coagulationd. softening

Which of the following areas have the highest population density? a) quebecb) united statesc) californiad) new york city

In a repredentive democracy: a.) people come together in large meetings to vote on public policy b.) the people govern themselves c.) political power is held by a small group of people d.) people elect officials to run the government for them

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies?