With a higher the concentration of hydrogen ions, a solution is more acidic and has a lower pH. Having read the above passage, choose the right answer to the following question (choices are higher or lower ): James wants to create a solution that is less acidic than others, so his concentration of hydrogen ions will be higher or lower?
lower

At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react. Having read the above passage, choose the right answer to the following question (choices are high or low ): Mike is watching how particles of reactants function, and sees that they are crowded very close. Considering that the concentration of them is very high, the chance of them colliding together is high or low?
high

Q: Greater use of oil and other fossil fuels causes more pollution. Having read the above passage, choose the right answer to the following question (choices are more or less ): If the citizens of Europe began using oil, they should have more or less pollution?
A: more

Question: Therefore, water nearer shore usually contains more dissolved nutrients than water farther from shore. Having read the above passage, choose the right answer to the following question (choices are more or less ): Water near shore will have more or less dissolved nutrients than water further away shore?
Answer: more

*Question*
The closer objects are, the stronger the gravitational pull between them. Having read the above passage, choose the right answer to the following question (choices are increases or decreases ): If Mona moves her baseballs closer together, what happens to the gravitational pull between them increases or decreases?
**Answer**
increases

Q: As the amount of water increases, the melting point of rock decreases. Having read the above passage, choose the right answer to the following question (choices are increased or decreased ): Ian is trying to melt rocks, nothing that the water around the rocks is quite high. Since there is a lot of water around the rocks, the melting point of the rock will be increased or decreased?
A: decreased