*Question*
The more dense the medium, the slower the light moves. Having read the above passage, choose the right answer to the following question (choices are faster or slower ): A very dense medium will cause light to move faster or slower?
**Answer**
slower

*Question*
Increased resource use generally means more waste; electronic waste from developed nations is a growing problem in the developing world. Having read the above passage, choose the right answer to the following question (choices are it is more or it is less ): Wendy lives in a country that uses many resources. Which is likely true about the amount of waste produced compared to a developing country it is more or it is less?
**Answer**
it is more

*Question*
More pollutants mean poorer air quality. Having read the above passage, choose the right answer to the following question (choices are Chicago or Mexico City ): Michael is studying the air quality of various cities. He finds that there are many more pollutants in the air in Mexico City, than there are in the air of Chicago. Therefore, the air quality will be higher in Chicago or Mexico City?
**Answer**
Chicago

*Question*
If we have two materials with the same volume, the material with a higher mass will be more dense. Having read the above passage, choose the right answer to the following question (choices are larger or smaller ): Mike put two things into buckets of water. The first bucket got a rubber duck, and the second bucket got a bowling ball. The water was less displaced in the bucket with the rubber duck, because the mass was larger or smaller?
**Answer**
smaller