Answer the following question given this paragraph: Q: Animals need plants for food and? Choices: - fuel - reproduction - shelter - energy A:
energy
Answer the following question given this paragraph: Explain why the fission of heavy nuclei releases energy. Similarly, why is it that energy input is required to fission light nuclei? 19. Explain, in terms of conservation of momentum and energy, why collisions of neutrons with protons will thermalize neutrons better than collisions with oxygen. The ruins of the Chernobyl reactor are enclosed in a huge concrete structure built around it after the accident. Some rain penetrates the building in winter, and radioactivity from the building increases. What does this imply is happening inside? 21. Since the uranium or plutonium nucleus fissions into several fission fragments whose mass distribution covers a wide range of pieces, would you expect more residual radioactivity from fission than fusion? Explain. The core of a nuclear reactor generates a large amount of thermal energy from the decay of fission products, even when the power-producing fission chain reaction is turned off. Would this residual heat be greatest after the reactor has run for a long time or short time? What if the reactor has been shut down for months? 23. How can a nuclear reactor contain many critical masses and not go supercritical? What methods are used to control the fission in the reactor? 24. Why can heavy nuclei with odd numbers of neutrons be induced to fission with thermal neutrons, whereas those with even numbers of neutrons require more energy input to induce fission? 25. Why is a conventional fission nuclear reactor not able to explode as a bomb?. Q: The core of a nuclear reactor generates a large amount of what type of energy from the decay of fission products, even when the power-producing fission chain reaction is turned off? Choices: - evaporation - elastic - erosion - thermal A:
thermal
Q: Answer the following question given this paragraph: Q: What is the product of microfilament movement powered by chemical energy? Choices: - blood circulation - nerve stimulation - muscle fusion - muscle contraction A:
A: muscle contraction
Question: Answer the following question given this paragraph: Runoff is precipitation that flows over the surface of the land. This water may travel to a river, lake, or ocean. Runoff may pick up fertilizer and other pollutants and deliver them to the water body where it ends up. In this way, runoff may pollute bodies of water. Q: What is precipitation that flows over the surface of the land? Choices: - blizzard - seawater - storm surge - runoff A:
Answer: runoff
*Question*
Answer the following question given this paragraph: The mass lost in mass defect has gone into energy that is called binding energy. Q: The mass lost in mass defect has gone into energy called what? Choices: - momentum - enthalpy - kinetic energy - binding energy A:
**Answer**
binding energy
(Q).
Answer the following question given this paragraph: Hormonal Regulation of Metabolism Blood glucose levels vary widely over the course of a day as periods of food consumption alternate with periods of fasting. Insulin and glucagon are the two hormones primarily responsible for maintaining homeostasis of blood glucose levels. Additional regulation is mediated by the thyroid hormones. Q: What are the two hormones primarily responsible for maintaining homeostasis of blood glucose levels? Choices: - dopamine and melanin - anabolic and metabolic - insulin and estrogen - insulin and glucagon A:
(A).
insulin and glucagon