Q: A scientist, John, has two containers of the same noble gas. John sends electricity through container A. Just as he is about to activate the electricity for container B, the power goes out, and he is unable to do so. Frustrated, John goes to find the circuit breaker to see if a fuse has blown. Which container doesn't have energized electrons? Hint: Noble gases are also used to fill the glass tubes of lighted signs like the one in the Figure below . Although noble gases are chemically nonreactive, their electrons can be energized by sending an electric current through them. When this happens, the electrons jump to a higher energy level. When the electrons return to their original energy level, they give off energy as light. Different noble gases give off light of different colors. Neon gives off reddish-orange light, like the word "Open" in the sign below. Krypton gives off violet light and xenon gives off blue light.
A: container B

Q: Jake and his son Ryan just had their yearly physical examination by the doctor. As part of this year's examination, both men had their arterial walls examined to identify the presence of plaques. The doctor discovered that Jake had a high amount of plaques present on the interior of his arterial wall. Ryan, on the other hand, had no plaques present. Who has atherosclerosis? Hint: Cholesterol has been implicated in heart disease for decades. Atherosclerosis is a disorder of the arteries in which cholesterol and other materials are deposited on the interior of the arterial wall. These deposits lead to the formation of plaques that can restrict or even block the flow of blood through these blood vessels (see Figure below ). A decrease in the flow of blood can lead to high blood pressure and a lowered oxygen supply to the heart muscle. A complete blockage of blood flow to parts of the heart (a heart attack) can cause significant damage due to oxygen deprivation, in some cases leading to death.
A: Jake

Q: Two students at the Agricultural Institute studied pedology. Bob studied soil weathering, while Dan studied types of soil. Which student studied less about high rainfall that carries material away? Hint: Rainfall in an area is important because it influences the rate of weathering. More rain means that more rainwater passes through the soil. The rainwater reacts chemically with the particles. The top layers of soil are in contact with the freshest water, so reactions are greatest there. High rainfall increases the amount of rock that experiences chemical reactions. High rainfall may also carry material away. This means that new surfaces are exposed. This increases the rate of weathering.
A: Dan

Q: Sandra liked all creatures but loved to study frogs. Her sister Julie studied more about fish and butterflies. They both loved nature. Which sister heard more frog calls during the day? Hint: You may hear males "ribbiting," producing a mating call used to attract females to the bodies of water best for mating and breeding. Frog calls can occur during the day or night. Each frog species has a different call that is used to attract mates and warn off rivals. When a female picks a male whose call she likes, the male grabs her and squeezes across her back and around her abdomen. This causes the female to release her eggs. The male then fertilizes the eggs and, in some species, also guards them.
A:
Sandra