Ques: More advanced farming practices allowed a single farmer to grow food for many more people.  John was studying the history of agriculture for his master's project. He noticed that before the methods of farming became more advanced, the amount of food produced was Larger or Smaller?
Ans: Smaller

Ques: 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.  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?
Ans: less prevalent

Ques: Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do.  A country like the US burns more fossil fuels than a third world country. This means that a third world country causes more or less pollution than a richer country?
Ans: less

Ques: Gravity is a pull which all matter exerts on all other matter, the more mass, the stronger the pull.  A satellite was sent to orbit and monitor a small planet but instead it ended up being pulled into the orbit of a nearby large planet. It was concluded that this happened because the gravitational pull of the larger planet was stronger or weaker?
Ans:
stronger