Renewable Energy

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Across
  1. 2. Energy derived from sources that are finite and cannot be replenished in a short period, such as fossil fuels (coal, oil, natural gas) and nuclear energy.
  2. 5. Heat energy extracted from the Earth's crust, usually in the form of steam or hot water, for heating buildings or generating electricity.
  3. 6. Electricity generated by harnessing the energy of tidal movements in the ocean using tidal turbines or barrages.
  4. 7. Electricity generated by harnessing the energy of the sun using photovoltaic cells or solar thermal systems.
  5. 9. Devices that convert sunlight directly into electricity using semiconductor materials, commonly known as solar cells.
  6. 10. Electricity generated by harnessing the kinetic energy of the wind through wind turbines.
  7. 11. Devices that generate electricity by combining hydrogen and oxygen in an electrochemical reaction, producing water vapor as the only byproduct.
  8. 12. Greenhouse gases, primarily carbon dioxide, released into the atmosphere from the combustion of fossil fuels, contributing to climate change and global warming.
  9. 15. Electricity generated by harnessing the energy of flowing or falling water, typically by using dams or turbines in rivers or streams.
  10. 18. Energy derived from organic materials, such as wood, agricultural residues, or municipal solid waste, through combustion or biochemical processes.
  11. 19. Electricity generated by harnessing the energy of ocean waves through devices like wave buoys, oscillating water columns, or wave attenuators.
Down
  1. 1. The ratio of useful energy output to the total energy input in a system, often achieved through improvements in technology or behavior to reduce energy waste.
  2. 3. A gaseous fossil fuel composed primarily of methane, often used for heating, electricity generation, and as a feedstock in industrial processes.
  3. 4. Energy derived from sources that are naturally replenished, such as sunlight, wind, rain, tides, waves, and geothermal heat.
  4. 8. Fuels derived from renewable biological resources, such as plant biomass or organic waste, used for transportation or heating.
  5. 12. A combustible black or brownish-black sedimentary rock composed primarily of carbon, widely used as a fuel for electricity generation and industrial processes.
  6. 13. Energy produced by nuclear reactions, typically through the fission or fusion of atomic nuclei, used to generate electricity in nuclear power plants.
  7. 14. Arrays of interconnected photovoltaic cells used to capture and convert solar energy into electricity.
  8. 16. Nonrenewable energy resources formed from the remains of ancient plants and animals over millions of years, including coal, oil, and natural gas.
  9. 17. A liquid fossil fuel extracted from underground reservoirs, refined into various petroleum products like gasoline, diesel, and jet fuel.