Energy from Volcanoes | Geothermal Energy | Grade 9 Science Quarter 3 Week 3 -4| DepEd MELC-based

good day students another week another video lesson for grade nine science we are now in quarter three weeks three and four lesson is about energy from the volcano or geothermal energy let us have our learning objective at the end of this video lesson you are going to illustrate how energy from volcanoes may be tapped for human use get ready to learn our lesson for today so keep on watching [Music] have you ever been in hot spring we love to enjoy the soothing and energizing effect of water from hot springs have you ever wondered where the heat from the hot spring came from since our country is a home to more than 100 volcanoes energy has been topped from them recently the philippines ranks third in the world's production of geothermal energy according to the department of energy 14.4 of the country's total power generation is produced from geothermal energy the production of electricity from geothermal energy is cheaper than the electricity production using natural gas coal and hydropower but what is geothermal energy the earth is believed to be extremely hot from within this heat from the earth's interior is a source of energy called geothermal energy geothermal came from the greek word geo which means earth and therme which means heat therefore it is the heat from the earth geothermal energy is the heat that is stored deep within the earth that originates from the melted magma and the decay of radioactive substances an example of a geothermal energy is shown in your screen right now most geothermal energy resources are usually found in the areas around plate borders where most volcanic eruptions and earthquakes happen in addition areas with active volcano have high geothermal energy system this is because the hot molten rock materials called magma located under the earth's surface may heat the circulating ground water now how is geothermal energy generated geothermal energy is generated in two ways the first way is geothermal power plants it is where heat from within the earth changes water into steam which turns steam turbines that generate electricity geothermal power plants are found in places where it is particularly hot just below the surface such as near a group of gazers hot springs or volcanic activity they generate energy by carrying heat to the surface via fluid circulation through various types of mechanics now let us discuss the steps on how to generate electricity on a geothermal power plant the first one whales are drilled dipped into the earth to pump steam or hot water to the surface second one when the water reaches the surface the drop in pressure causes the water to turn into steam step 3 the steam spins a turbine which is connected to a generator that produces electricity step 4 the steam will go to the cooling tower it will cool down and condenses back to water and last step the cold water is pumped back into the earth to begin the process again that is how geothermal power plant works let's have it again class let us use another picture again whales are drilled deep into the earth to pump steam or hot water when the water reaches the surface the drop in pressure causes the water to turn into steam steam spins a turbine that is connected to a generator that produces electricity step 4 cooling tower cools down the steam which condenses back to water and lastly the cold water is pumped up into the earth to begin the process again take note of those steps now because philippines is located in the so-called pacific ring of fire it has many volcanic areas that can be utilized for geothermal energy production here are some geothermal power plants found in the philippines tiwi geothermal power plant in tiwi albay [Music] makban or maki ling banaho geothermal power plant located in the borders of laguna and batangas or here are other geothermal power plants in the philippines [Music] next is the flow chart which describes how energy is transformed to generate electricity in a geothermal power plant thermal energy from inside the earth when we say thermal energy it is also called heat energy it is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other next mechanical energy in a turbine and then mechanical energy of a generator when we say mechanical energy it is the energy that is possessed by an object due to its motion or due to its position and lastly we have electrical energy electrical energy is a form of energy resulting from the flow of electric charge next the second way to generate geothermal energy is through geothermal heat pumps it removes the heat from the fluid in the earth connection concentrates it and then transfer it to the building let's take a look of this photo geothermal heat pumps harness geothermal energy from beneath the earth and take advantage of this resource for heating or cooling of building or houses amazing right now let us have the advantages and disadvantages of using geothermal energy geothermal energy is renewable it can be accessed and harvested anywhere in the world also the water is replaced by rainfall and the heat is continuously produced by the earth the geothermal reservoirs found within the earth are naturally replenished making it both renewable and sustainable geothermal energy is more environmentally friendly for keeping a low carbon footprint pollution associated with geothermal energy is relatively minimal compared to the use of fossil fuels on the other hand once a geothermal power plant has been built there will be a great chance to spend more on the different processes facilities and tools to be used in this site also it poses some environmental problems because there are still other gases stored dipped within the earth which are released into the atmosphere during digging it may also require proper supervision to maintain its stability and sustainability considering geothermal fluids contain low levels of toxic materials that need to be disposed of being situated in the areas near volcanoes it would be inevitable for always having a danger of volcanic eruption putting up a geothermal power plant may give rise to minor earthquake as a result of digging to sum it up class geothermal energy is helpful in our country and that ends our lesson for today i hope you learned something new thank you so much for watching i will appreciate it if you like share subscribe and turn on the post notification button comment down if you want a shout out for my next video love lots guys bye [Music] so

Channel: Maestrang Techy

Views: 318,656

Keywords: Volcano, Grade 9 Science answers, Earth and space, Deped MELC-BAsed lesson, Energy from volcanoes, Geothermal powerplant, Geothermal heat pumps, Advantage, Disadvantage, Heat Energy, Thermal, Active volcano

Id: oh5idkjdD34

Length: 9min 42sec (582 seconds)

Published: Tue Apr 06 2021