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IGCSE Physics Science Lesson
Transcript of IGCSE Physics Science Lesson
IGCSE Physics Hydropower is... Efficient Renewable Hydropower is natural, and it utilizes never-ending energy as its power source. Sources of power include:
Evaporation Hydropower will never run out of energy. It utilizes a common form of energy, which is found everywhere.
Supplies 17.5% of the world’s electricity. Hydropower isn't... Environmentally Friendly Construction of dams obstruct rivers and prevent salmon from moving upstream. Dams also require a water reservior upstream, and if it's not there beforehand, then it will creat one. This results in loss of land as perfectly good land becomes submerged in water. Advantages A reliable energy source.
Elimination of the cost of fuel.
Do not directly produce carbon dioxide.
Relatively cheap to build and cheap to maintain.
Disadvantages Ecosystem damage and loss of land.
Risks connected with the construction of dams.
Methane emissions form reservoirs
Need to relocate the people living where the reservoirs are planned.
Dependent on constant river flow. Hydroelectricity
the production of electrical power through the use of the gravitational force of falling or flowing water. Jibrail and DAniel, please work on this :) to be continued... :D Hydropower It is available in many forms:
1. Potential energy from high heads of water retained in dams.
2. Kinetic energy from current flow in rivers, tidal barrages, and from the movement of waves.