Quiz 48: The Biosphere

Biology

Nuclear power has both advantages and disadvantages. With the advancement in science, the technology required for Nuclear Power plants is feasible and the operation cost is low, once constructed. A single nuclear power plant can generate electrical energy required for the industrial and domestic needs of a city. The nuclear waste can be minimized through waste recycling and reprocessing the waste. Nuclear Energy provides a constant supply of energy throughout the year. The amount of carbon released is also less compared to fossil fuels. However the risk of accidents is high when nuclear energy is used. The meltdown of a 500-megawatt reactor situated 30 miles away from a city can lead to the immediate death of several people and cause irreparable damage to buildings. The nuclear waste generated is not easy to handle. If there is no proper shielding the dose can be lethal within seconds can be hazardous for several human generations. Ten kilometers is a very small distance and it is not advisable to set up a nuclear power plant at such distance from a residential area.

Latitudinal and seasonal variations in sunlight results in heating up of ocean water, which set currents in motion. These currents distribute the heat energy around the seas and affect the weather patterns. Hence the answer is c. seasonal variations

I do not support off vehicle riding in desert. The scarcity of water makes desert very fragile. It takes a very long time for the plants like saguaro cactus in the desert to grow. Off road vehicle riding leave tracks on the soil which damages the vegetation. Destruction of vegetation directly leads to soil erosion and indirectly to the destruction of animals. The habitats of some animals like rodents are also destroyed. Animals that hide in the sand, like the sand viper might be accidentally killed during the off road vehicle riding. Since soil in the desert is held by the plants roots, once plants are destroyed the soil will erode in the strong winds. 

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