Which of the following is the most abundant gas emitted from volcanoes?
A. carbon dioxide
B. water vapour
C. nitrogen
D. sulfur dioxide
Answer: B
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Why might the following nuclear reaction not be very good for energy production in a fission reactor? U ? Th + He + 3 neutrons
A) The material only produces a few neutrons so the chain reaction will not be very efficient. B) The reactants are too small to obtain much energy from the missing mass due to the strong nuclear force. C) The products are not the right size to obtain much energy from missing mass due to strong nuclear force. D) The mass of the byproducts is too high and therefore the energy released will not be large enough. E) Interatomic attraction between the products will impede the separation of the atoms from the unstable nuclei.
A natural resource is defined by three elements:
A) cultural values, technology and economic system. B) resource availability, technology and economic system. C) cultural values, resource availability and economic system. D) cultural values, technology and resource availability.
A coastline is covered with sea caves. What kind of beach is this likely to be?
a. A low-energy beach b. A passive beach c. An erosional beach d. A depositional beach
Instructions: Choose one answer from each pair of selections. The sun often appears redder as it sets, which means that MORE | LESS blue light is scattered as the sunlight passes through the atmosphere