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Explain why the Sun is considered the primary source of energy for (i) biofuel and (ii) hydroelectricity - Junior Cycle Science - Question c - 2014
Question c
Explain why the Sun is considered the primary source of energy for (i) biofuel and (ii) hydroelectricity. Biofuel Hydroelectricity
Worked Solution & Example Answer:Explain why the Sun is considered the primary source of energy for (i) biofuel and (ii) hydroelectricity - Junior Cycle Science - Question c - 2014
Step 1
(i) biofuel
Answer
The Sun is considered the primary source of energy for biofuel because sunlight is essential for the process of photosynthesis. In this process, plants use sunlight to convert carbon dioxide and water into glucose and oxygen. The glucose produced serves as a chemical energy source that can be stored as biomass, which can later be converted into biofuels like ethanol or biodiesel.
Step 2
(ii) hydroelectricity
Answer
For hydroelectricity, the Sun plays a significant role by driving the water cycle. Sunlight causes the evaporation of water from oceans, lakes, and rivers, leading to the formation of clouds. This process eventually results in precipitation (rainfall). When the rain falls into water bodies, it creates potential energy that can be harnessed to generate hydroelectric power.