Pigments in the skin act like a filter that can prevent the skin from making vitamin D. As a result, people with darker skin need more time in the sun than people with lighter skin to make the same amount of vitamin D. Having read the above passage, choose the right answer to the following question (choices are more prevalent or less prevalent ): Caucasian Americans have lighter skin than other Americans. Researchers were not surprised to discover therefore, that vitamin D insufficiency among Caucasian Americans is more prevalent or less prevalent than among other Americans?
less prevalent

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 more or less ): Does a ball on earth have more or less gravity on it than in space more or less?
more

Q: Solar power is expensive, but as demand increases technology improves and costs decrease. Having read the above passage, choose the right answer to the following question (choices are less or more ): If demand for solar power were increase, the power would become less or more expensive?
A: less

Question: The gravitational force between two objects decreases as the objects move further apart. Having read the above passage, choose the right answer to the following question (choices are increases or decreases ): If Milo is holding two objects close together and he decides to move them farther apart, what happens to the gravitational force between the objects increases or decreases?
Answer: decreases

*Question*
The thinner the wire, the more resistance it offers. Having read the above passage, choose the right answer to the following question (choices are greater or less ): Robin is using aluminum foil to make small cylinders. A foil cylinder of diameter 1cm likely has greater or less resistance than a foil cylinder of diameter 10cm?
**Answer**
greater

*Question*
A given volume of a denser substance is heavier than the same volume of a less dense substance. Having read the above passage, choose the right answer to the following question (choices are more dense or less dense ): Sarah is carrying two tubs, one is filled with rocks, the other with feathers. The tub with feathers will be lighter because it is more dense or less dense?
**Answer**
less dense