The document discusses different types of energy sources including non-renewable sources like fossil fuels such as coal, oil, and natural gas as well as nuclear power. It also discusses renewable energy sources including solar, wind, hydropower, biomass, biofuels, and geothermal energy. It provides brief descriptions of each type of energy source and notes that over 85% of the world's energy currently comes from non-renewable sources.
Our school is located in central Athens near several landmarks. To the south is the former stadium of the Panathinaikos football team. To the north is the Athens Music Hall. Students can reach the school using the Athens metro at the Ampelokipi stop. To the east is the 230m tall Lycabettus Hill with a small church, a 15 minute walk from the school. To the west are buildings like the Athens Tower, cinemas, cafes and hospitals.
Any natural system contains or stores energy, which is defined as the amount of work required to transition a system from an initial to final state. Renewable energy comes from natural resources like solar, wind, water, and geothermal heat, which are naturally replenished. Solar energy comes from sunlight and can be harnessed for applications like space heating, water purification, daylighting, solar hot water, solar cooking, and industrial processes. Wind power converts wind energy into electricity using wind turbines or for mechanical power using windmills. Hydropower harnesses the force of moving water for uses like irrigation, powering mills and machinery.
The document discusses different types of energy sources including non-renewable sources like fossil fuels such as coal, oil, and natural gas as well as nuclear power. It also discusses renewable energy sources including solar, wind, hydropower, biomass, biofuels, and geothermal energy. It provides brief descriptions of each type of energy source and notes that over 85% of the world's energy currently comes from non-renewable sources.
Our school is located in central Athens near several landmarks. To the south is the former stadium of the Panathinaikos football team. To the north is the Athens Music Hall. Students can reach the school using the Athens metro at the Ampelokipi stop. To the east is the 230m tall Lycabettus Hill with a small church, a 15 minute walk from the school. To the west are buildings like the Athens Tower, cinemas, cafes and hospitals.
Any natural system contains or stores energy, which is defined as the amount of work required to transition a system from an initial to final state. Renewable energy comes from natural resources like solar, wind, water, and geothermal heat, which are naturally replenished. Solar energy comes from sunlight and can be harnessed for applications like space heating, water purification, daylighting, solar hot water, solar cooking, and industrial processes. Wind power converts wind energy into electricity using wind turbines or for mechanical power using windmills. Hydropower harnesses the force of moving water for uses like irrigation, powering mills and machinery.
Renewable energy resources are becoming increasingly important due to concerns about energy supply and demand. As populations and industries have grown, the demand for energy has far outstripped the available supply of energy from fossil fuels. In response, interest has grown in developing alternative renewable energy sources like solar, wind, hydroelectric, and geothermal power. While hydroelectric and nuclear have provided some alternatives, most renewable sources still require additional energy input to be viable or have not been scaled up significantly. Improving energy efficiency through mechanisms like negawatt power can also help balance the supply and demand of energy.
The document discusses the topic of energy crises. It defines an energy crisis as occurring when there is a bottleneck or price rise in the supply of energy resources to an economy. It notes that there has been a huge increase in demand for energy due to industrial growth and population growth, but that supply is far less than actual demand. It lists some potential causes of energy crises like market manipulation, industrial actions, overconsumption, aging infrastructure, and disruptions in oil refining and transport. The document warns that prolonged energy shortages can become humanitarian crises if they impact access to electricity, heating, cooking and water.
Wave energy and tsunami technologies capture energy from ocean waves. A variety of technologies have been proposed, including devices that extend perpendicular to waves to capture energy, oscillating water columns that use wave motion to drive turbines, floating structures that flex with wave heights to power generators, and reservoirs that are filled by waves to power turbines when water is released. Tsunamis are large sea waves caused by underwater disturbances like earthquakes that can devastate coastal regions due to their immense size and energy.
Renewable energy resources are becoming increasingly important due to concerns about energy supply and demand. As populations and industries have grown, the demand for energy has far outstripped the available supply of energy from fossil fuels. In response, interest has grown in developing alternative renewable energy sources like solar, wind, hydroelectric, and geothermal power. While hydroelectric and nuclear have provided some alternatives, most renewable sources still require additional energy input to be viable or have not been scaled up significantly. Improving energy efficiency through mechanisms like negawatt power can also help balance the supply and demand of energy.
The document discusses the topic of energy crises. It defines an energy crisis as occurring when there is a bottleneck or price rise in the supply of energy resources to an economy. It notes that there has been a huge increase in demand for energy due to industrial growth and population growth, but that supply is far less than actual demand. It lists some potential causes of energy crises like market manipulation, industrial actions, overconsumption, aging infrastructure, and disruptions in oil refining and transport. The document warns that prolonged energy shortages can become humanitarian crises if they impact access to electricity, heating, cooking and water.
Wave energy and tsunami technologies capture energy from ocean waves. A variety of technologies have been proposed, including devices that extend perpendicular to waves to capture energy, oscillating water columns that use wave motion to drive turbines, floating structures that flex with wave heights to power generators, and reservoirs that are filled by waves to power turbines when water is released. Tsunamis are large sea waves caused by underwater disturbances like earthquakes that can devastate coastal regions due to their immense size and energy.
