Rougher surfaces have more friction between them than smoother surfaces. Having read the above passage, choose the right answer to the following question (choices are more or less ): A piece of glass has more or less friction than a piece of sandpaper?
less

(Question)
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 decrease or increase ): If Jim wants to lower the pH of his solution he should do what to the concentration of hydrogen ions inside of it decrease or increase?
(Answer)
increase

Ques: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration. Having read the above passage, choose the right answer to the following question (choices are decrease or increase ): An increase in birth rates indicates a/an decrease or increase in the food supply?
Ans: increase

(Q).
The warmer a climate is, the more types of vegetation it will have and the greater the rate of biological weathering. Having read the above passage, choose the right answer to the following question (choices are Bob or Ann ): Ann and Bob were both farmers. Ann lived in a colder climate while Bob lived in a warmer climate. When they compared notes they found that the number of crops they could successfully grow was different. Who's farm would be able to grow more types of crops Bob or Ann?
(A).
Bob

Ques:Fossils found at the lowest layer of rock would be the oldest, as these would have been buried for the longest time, whereas fossils found closer to the surface would be buried more recently and therefore be younger. Having read the above passage, choose the right answer to the following question (choices are deeper or less deep ): Jonathan is digging at a site, trying to uncover old rocks. In order to find the oldest rocks, Jonathan needs to dig deeper or less deep?

Ans:deeper

A thinner wire is more difficult for electrons to move through than a thicker wire. Having read the above passage, choose the right answer to the following question (choices are Thicker or Thinner ): John was looking at a diagram of an electrical system. He observed that it was less difficult for electronics to move when the wire was Thicker or Thinner?
Thicker