The key concepts for this section. The concept of nuclear fission and nuclear fusion. The working of a nuclear fission reactor. The major safety features of a nuclear fission reactor. The description of a nuclear fuel cycle. The risks related to storage of highly radioactive spent fuel rods. The problem of high-level radioactive waste from spent fuel rods dealt by the United States. The fate of worn-out nuclear power plants. The arguments over the widespread use of nuclear power would slow down the projected climate change during this century. The arguments of experts who disagree over the future of nuclear power. The relationship between nuclear power plants and the spread of nuclear weapons. The potential of nuclear fusion as an energy resource.
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ENVIRONMENTAL SCIENCE (LL) >CUSTOM<
- 45) The roughness layer refers to A) the atmospheric layer where wind has the fastest velocities. B) the layer of active weather between the stratosphere and the surface. C) the shallow layer of nearly still air. D) the layer of the atmosphere where dust storms occur.arrow_forward47) Deflation is the process by which A) wind transports smaller particles leaving behind only larger pebbles and rocks. B) sands are deposited closer to the source area and silts are deposited farther. C) sand dunes migrate downwind as sand saltates up the windward face. D) rocks are worn away by bombardment of particles carried in Windstream.arrow_forward46) In Barchan dunes, the slip face is oriented A) on the convex side of the dunes. B) parallel to wind direction. C) on the concave side of the dunes. D) at varying angles.arrow_forward
- 43) Glacial abrasion is when A) boulders are fragmented into smaller particles under the weight of the overlying ice. B) blocks of rocks are plucked from the underlying bedrock. C) rocks are carried at the base of a glacier and grind away at the underlying bedrock. D) debris fall onto the top of the glacier and are carried down glacier.arrow_forward34) Which of the following is true of soils? A) Soils rich in mineral matter are usually dark in colour. B) They usually require hours or days to form. C) Their development is affected by climate and organisms. D) Their properties are not affected by the type of rock from which they form. E) Older soils usually have fewer horizons than younger soils.arrow_forward44) In periglacial environments, the layer of ground that thaws every summer and freezes every winter is called A) frost layer B) permafrost C) active layer D) discontinuous permafrostarrow_forward
- 42) The ablation zone of a glacier A) has a total positive mass balance. B) is where snow accumulates and transforms into ice. C) is located in the upper part of the glacier. D) is where ice mass is lost.arrow_forward41) Alpine glaciers A) are the largest types of glaciers. B) conform to the shape of the landscape. C) cover large sections of continents. D) show no relationship with the underlying topography.arrow_forward40) Marine terraces are the result of A) coastal emergence through uplift or sea level decrease. B) coastal submergence through erosion or sea level increase. C) deposition of sands by the longshore current. D) wave refraction causing a loss of energy that allow sediments to be deposited.arrow_forward
- 39) Translatory waves A) are the types of waves located furthest away from the shore. B) are slowed down by friction with the bottom of the ocean. C) move water particles in perfectly circular orbits. D) do not interact with the bottom of the ocean.arrow_forward37) Which of the following terms is used for a type of sediment transport in streams? A) discharge. B) overland flow. C) saltation. D) sheet flow. E) abrasion.arrow_forward33) You would expect only slight physical and chemical weathering under conditions of A) temperatures below freezing. B) extreme cold and high precipitation. C) extreme heat and no precipitation. D) lower mean annual rainfall and temperatures. E) higher temperatures and lower precipitation.arrow_forward
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