Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town. Which hydrologist learned less about the causes of acid rain formation?
Ans: Dan

Michael and Robert are two patients at a cardiology clinic. Both just received their blood test results and were told that they need to improve their cholesterol levels. They were each recommended to make changes to their diets. Michael took this advice to heart, and reduced the levels of saturated fat and dietary cholesterol he consumed. Robert, on the other hand, continued to consume high levels of saturated fat and dietary cholesterol. Who will have lower levels of LDL cholesterol in the future?
Ans: Michael

John liked studying about the planets in our solar system. He recently studied and made comparisons between Earth's and Venus's atmosphere. He was amazed with what he found out. Which planet has a thicker atmosphere?
Ans: Venus

Two sister villages, both situated near volcanoes, experience daily earthquakes. Green village started recording an increased size and number of earthquakes one day. Blue village didn't experience a change in the number of earthquakes. Which village started experiencing more ground shaking?
Ans: Green