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PRIMARIA - 5º - ENERGY II CHANGE THE WORLD - NATURAL SCIENCES - FORMACIÓN
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energy to change the world how can we save our planet as society develops something is
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happening that has never happened before our natural resources are diminishing as people
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continue to use non-renewable energy sources there is a huge loss in the stability of our
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planet we need to regain our balance but first how are we using energy to light
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our homes batteries for mobile devices gasoline and oil for transportation and
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natural gas for cooking there are four goals to reduce our impact an energy
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revolution upgrading to efficient food production manage the ocean and rewild
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the world energy revolution energy is the power derived by using chemical or
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physical resources it is required for sustained mental or physical activity we
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must avoid using non-renewable energy and instead focus on renewable energy
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what is non-renewable energy it's energy that takes millions of years to form and
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and it will run out eventually fossil fuels such as coal crude oil and natural gas are
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non-renewable energy burning those fossil fuels causes pollution for renewable energy
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we use the sun wind water heat from the earth and biomass renewable energy is often called
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green energy because it doesn't cause pollution it is natural energy and is always available
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there are five types of renewable energy solar geothermal hydroelectric biomass and wind solar
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energy there are two ways to capture solar energy active and passive active uses technology and
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equipment to focus the sunlight and capture the energy. Solar power plants are active solar energy.
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Passive uses no equipment. It uses the sunlight as it is naturally. Examples are the natural
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sunlight we use during the day to avoid electricity use. Advantages of solar energy are the solar cells
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last a long time disadvantages the sunlight is difficult to predict and can be expensive
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wind energy we use windmills windmills are two or three propeller-like blades inside the tower that
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produce electricity they are located on wind farms the advantages of wind energy are they are
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efficient and clean the disadvantages are they are not always steady and the turbine can be dangerous
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geothermal energy this energy begins at the core of the earth where it is very hot about
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5 000 degrees celsius the heat moves towards the earth's surface the underground rocks
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melt into magma and mixes with cooled water then the heat converts to steam and powers the turbines
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to create electricity the advantages of geothermal energy are they are clean and require no fuel but
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the disadvantage is some areas need water for steam hydroelectric energy power plants located
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on large dams to control the flow of the water. It creates artificial lakes or reservoirs that
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forces water through tunnels. The tunnels move huge turbines to generate electricity. The
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advantages are they are inexpensive, reliable, and controllable. But the disadvantages are they
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damage the environment and have a short lifespan. Biomass energy. This is energy that comes from
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recently living plants or microorganisms. For example, trees, scraps of bark, and
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recycled paper. Biomass is burned to create energy. The advantages are they
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can be stored and used when needed, but the disadvantages are they use large
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amounts of land and chemicals. Here are other renewable energy sources. Wave
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Safe energy uses waves from the ocean, lakes, or rivers, similarly to the hydroelectric plant.
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Oligofuel uses chemicals in seaweed to create a clean biofuel.
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Sustainability is the practice of maintaining global productivity by avoiding the depletion of natural resources.
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Sustainable development is necessary because, socially, people have excessive consumption habits.
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Ecologically, there are limited natural resources, such as nutrients in the soil and drinking water.
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And lastly, economics.
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Growing economic activity equals higher production needs for continued growth.
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Let's save our planet, together.
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- Subido por:
- Cp santodomingo algete
- Licencia:
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- Visualizaciones:
- 105
- Fecha:
- 22 de marzo de 2020 - 21:05
- Visibilidad:
- Público
- Centro:
- CP INF-PRI SANTO DOMINGO
- Duración:
- 06′ 30″
- Relación de aspecto:
- 1.78:1
- Resolución:
- 1920x1080 píxeles
- Tamaño:
- 152.79 MBytes
