Some students studied Earth's atmosphere in class. They also started studying Venus' atmosphere. They were fascinated by the subject and learned a lot. Which planet has an atmosphere that is not toxic to humans, Venus or Earth?
Ans: Earth

The students studied two ponds. Class A studied a pond filled with protozoa, while class B studied a pond with almost no protozoa. Which class observed more engulfing and digesting of other organisms?
Ans: Class A

Greg is is a chef. Last night, he was in his kitchen preparing foods for the guests. First, he made some lemonade. In trial one he added some honey in it and stirred it, but in trial two he didn't stir it. Then he made some coffee. In trial three he added hot water in it, but in trial four he added cold water in it. Finally, he made some soup. In trial five he added fine grain salt in it, but in trial six he added coarse salt in it. Would the coffee be prepared faster or slower in trial four than in trial three?
Ans: slower

John wanted to invent a machine. To that end, he devised an experiment in which he used three components, comp A, comp B, and comp C. Comp A was a machine that applied force over a shorter distance. Comp B was also a machine, but it applied force over a longer distance. Comp C was not a machine. Would comp B increase or not increase the force applied compared to comp A?
Ans: not increase