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?
Ans: Bill

Bob is an astrophysicist. He was pondering about the beginning of our universe. He pinpointed the time when the universe just began to exist. He labeled it as point A. To compare it with present situation of the universe he labeled the present time as point B. In point B would the redshift be smaller or greater than in point A?
Ans: greater

John wanted to make some lighted signs for his business. To that end, he chose noble gases, neon, krypton, and xenon. First, he kept the noble gases in containers. He called it step A. Then he passed electric current through them. He called it step B. In the process, he came up with three signs, sign A, sign B, and sign C. Sign A used neon. Sign B used krypton, and sign C used xenon. In which step the the electrons would not jump to higher energy level, step A or step B?
Ans: step A

Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought. Which country had less acid precipitation fall in forests?
Ans: Greece