Problem: Alexander is conducting reactions in his college chemistry class. In his first reaction, reaction A, he uses a high strength burner so the temperature of the reaction is high. In the second reaction, reaction B, he uses a weaker model of burner, so the temperature of the reaction is low. Which reaction will have molecules with lower average kinetic energy?

A: reaction B

Problem: Two students from the same class, studies different types of animals. Bill studied predators, while John studied grazers. Which student studied species that play an important role in an ecosystem?

A: Bill

Problem: Two teams of researches studied Antarctica's climate. The team studied two different regions. The US team studied East Antarctica, while the Swiss team studied West Antarctica. Which team learned about a region that shows stronger warming in winter?

A: Swiss

Problem: Two brothers were land owners. Bill owned 40 acres of forest, , with very well developed soil. His brother Rick owned 40 acres of grasslands, with a poor soil. Rick decided to sell his land. Which brother had fewer trees on his property?

A:
Rick