Alternate sources of Energy

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1 Alternate sources of Energy

2 Activity -1 Energy Sources Wind, Solar, Geothermal, and Hydroelectric Power There are many reasons to use alternative energy sources. One reason is to reduce pollutants and greenhouse gases. Alternative or renewable energy sources help to reduce the amount of toxins that are a result of traditional energy use. These alternative energy sources help protect against the harmful by-products of energy use and help to preserve many of the natural resources that we currently use as energy sources. There are many alternative energy sources: wind power, solar power, geothermal power, and hydroelectric power are some examples. Wind Power. Wind power is the ability to capture the wind in a way to propel the blades of wind turbines. When the blades rotate, this movement is switched into electrical current with the help of an electrical generator. In older windmills, wind energy turned mechanical machinery to do the physical work like crushing grain to make bread or pumping water to get water. Wind towers are built on wind farms, and usually there are several towers built together. In 2005, the worldwide use of wind-powered generators was less than 1% of all of the electricity use combined. There are several advantages of this energy source: there is no pollution, it never runs out, farming and grazing can still take place on the same land as the wind turbines, and wind farms can be built anywhere. One disadvantage is that you need a consistent wind to get enough power. If the wind speed decreases, less electricity is produced. Large wind farms can also have a negative visual effect for people who live nearby. Solar Power. Solar energy is used for heating, cooking, making electricity, and even taking salt out of saltwater so the water can be drinkable and used for additional purposes that do not need the salt. Solar power uses sunlight that hits the solar thermal panels to convert the sunlight to heat either air or water. Other methods of using solar power include simply opening up blinds or shades and letting the sunlight pass into the room or using some type of mirror to heat water and produce steam. One advantage of solar power is that it is renewable. As long as there is sunlight, you will be able to harness the power from it. There is also no pollution and it can be used efficiently to heat and light things. You can see the benefits of solar energy in heating swimming pools, spas, and water tanks in many cities across the country. Geothermal Energy. Geothermal means earth heat. This energy captures the heat energy under the Earth. Hot rocks under the ground help to heat water to produce steam. If holes are dug in this area of the ground, then the steam shoots up and is purified and used to drive turbines, which in turn gives power to electric generators. The advantages of this type of energy is that there are no harmful by-products, it is self-sufficient once the geothermal plant is built, and the plants are generally small so there is no negative visual effect on the area surrounding the plant. Hydroelectric Energy. The power that comes from the potential energy of water that is dammed up supplies energy to a water turbine and generator. Another example of this energy is to make use of tidal power. Today, electric generators can be powered by hydro power that can run backwards as a motor to pump water for later use. An advantage is that you can control the use of the energy by controlling the water. You can also generate water all the time as there are no outside forces that prevent this from happening. Furthermore, there is no pollution in using this type of energy. In fact, you can reuse the water that is used for hydroelectric power. The disadvantages are that dams are expensive to build and maintain. There also needs to be a powerful enough supply of water in the area to produce energy. In Conclusion. In your lifetime, there will be more advances made in the field of energy. Your generation will need to value the natural resources that human life needs on this earth. You will need to be part of the ongoing and individual application of alternative energy sources so the Earth stays healthy and our resources stay renewed.

3 Language Work A. Write the word meanings. toxins capture preserve expensive by-products B. Use each word in a sentence. Underline the word used. renewable propel consistent efficiently C. Word Search. Find the alternative energy sources in the word search: wind, solar, geothermal, and hydroelectric. J C Y G R E N E A T W I J E X T B O X T E R D S X E T Y E V R T Y F S R J G K F D C V Z B X A W U C N E T T X O A L D M I L X C E D Z R O W W E V W K U X J J S Z O I C D A O W Z K Z R A G H I K G G U D D Z P R C K N G I B Y A V U M N Z K L G H H K Y K A S U A G E O T H E R M A L H U D R L N S R K T Multiple-Choice Questions (Put an X in front of the correct answer.) 1. What are some examples of alternative energy sources? a. wind power b. solar power c. geothermal power d. hydroelectric power e. all of the above 2. Which type of power means earth heat? a. coal b. minerals c. geothermal d. hydroelectric

4 Extended Response (Answer in complete sentences.) 1. What is one reason cited in the text to use alternative energy sources? 2. Reread the last paragraph of the text. What does the author encourage the readers to do to keep the earth healthy and to renew resources? 3. Fill in the chart with at least one advantage and one disadvantage for each alternative energy source: Advantages Disadvantages ACTIVITY-2 Q I) ANSWER THE FOLLOWING QUESTIONS: A. WHEN AND BY WHOM WAS THE WINDMILL INVENTED? B. NAME THE PERSON WHO WAS THE FIRST TO DISCOVER WINDPOWER? C. WHEN AND BY WHOM WAS THE FIRST SOLAR POWERED AIRCRAFT INVENTED? D. NAME THE STATE IN INDIA WHICH HAS THE HIGHEST INSTALLED SOLAR CAPAITY? E. NAME THE FIRST OPERATIONAL HYDROELECTRIC GENERATING STATION IN UNITED STATES? QII) ACTIVITY A) FIND OUT THE HISTORY OF EVOLUTION OF ANY ONE ALTERNATIVE SOURCES OF ENERGY LISTED BELOW: 1. SOLAR ENERGY 2. HYDEL ENERGY 3. WIND ENERGY B) MAKE A COLLAGE OF DIFFERENT HYDROELECTRIC DAMS IN INDIA ALONG WITH THE STATES IT IS LOCATED IN.

5 Activity-3 Alternative energy encompasses all those things that do not consume fossil fuel. They are widely available and environment friendly. They cause little or no pollution. Energy that is not popularly used and is usually environmentally sound, such as solar or wind energy (as opposed to fossil fuels). Fuel sources that are other than those derived from fossil fuels, typically used interchangeable for renewable energy. Examples include: wind, solar, biomass, wave and tidal energy. QUESTION NO.1: Write about enabling technologies which use energy sources that are normally cost prohibitive. QUESTION NO.2 : Write about relatively new concepts for alternative energy. QUESTION NO.3: Create your own home made model such as wind turbine and geothermal plants.

6 Activity-4 Alternative energy is power that comes from sources which are not going to run out, do not pollute as much as fossil fuels (oil, coal, natural gas), or do not create leftover materials that are harmful to people and the environment. They are widely available and environment friendly. They cause little or almost no pollution. Alternative energy sources can be implemented for houses, for cars, factories and any other facility you can imagine. Scientists around the world are researching on developing and discovering new Alternative Energy Sources, so that the growing energy needs of human population can be met more easily, safely and efficiently. Create a power point presentation on Alternative Sources Of Energy The presentation shall have the following slides. Slide 1 Name of the presentation Alternative sources Of Energy Slide 2 Hydro Electric Energy Slide 3 Solar Energy Slide 4 Wind Energy Slide 5 Geothermal Energy Slide 6 Bio Mass Energy # Presentation may include the positive and negative impacts of different Alternative energy Use the following features to create the presentation:- 1. Appropriate slide design / background colour and shading. 2. Insert pictures related to the topic. 3. Use clip-art, word-art and callouts in the presentation. Note- Submit coloured hard copy of the presentation. # An example is given below for your reference.

7 Ativity 5 Alternative energy, by definition, is any source of energy that doesn't use fossil fuels. Commonly known alternative energy sources Hydroelectric Energy. Solar Energy. Wind Energy. Biomass Energy. Geothermal Energy. Tidal Power. Hydroelectricity is electricity produced from hydropower. Q1.a), Explain briefly the process of producing electricity from water. Paste relevant pictures to elabortate. b) How is Hydroelectricity cheaper than other resources? Q2. On a political map of India mark the states producing: a) Tidal energy d) Solar energy b) Wind Energy c) Biomass energy Q3. You must have been wondering how water becomes a strong tool in the generation of electricity Watch the given link and record your observation. ACTIVITY NO:6 Introduction: Alternate source of energy source that is an alternative to fossil fuel. Fossil fuels are substances that are built million of years ago by dead and decay of plants and animals. For example coal, petrol, petroleum etc. Once they have been used they cannot be used again and will take million of years to build. These alternatives are intended to address concerns about such fossil fuels, such as its high carbon dioxide emissions, an important factor its global warming. Ocean, hydroelectric, wind, geothermal and solar power are all alternative sources of energy.

8 a) What is solar energy? Name any four solar devices. b) Why there is a need to construct dam over a river in hydropower station. c) Explain why there is a need to save fossil fuels? d) Write down some ways with which you can help save fossil fuel by doing little effort starting from your home. e) What is a windmill? Give its uses explaining what is a windfam? Prepare a poster to create awareness on Alternate sources of Energy Chart Colour- Yellow Border- Blue

9 Activity-7 Q1. The following table consists of Renewable Power Capacity in India as of September 30th, Answer the questions that follow : SOURCES OF ENERGY POWER CAPACITY ( in MW ) 1. Wind Power 28, MW 2. Waste-to-Power MW 3. Biomass Power 4, MW 4. Small Hydro Power 4, MW 5. Solar Power 8, MW 4. Arrange the above data in ascending and descending order. 5. The power capacity of which source of energy is the maximum? 6. What is the total power capacity of all the sources of energy? 7. Is the power capacity of Biomass Power more than that of Small Hydro Power? If yes, by how much? Q2. The following Bar Graph depicts the state wise Solar Rooftop Target by 2022 ( in MW ). Answer the questions that follow: Which state has the highest solar rooftop target? Which 3 states are having equal solar rooftop targets? Is the target of Tamil Nadu more than that of Haryana? If yes, by how much. Is the target of Rajasthan exceeding the targets of Jharkhand and Bihar put together? If yes, by how much?

10 Art Winter break has come and children love to do some creative work,staying cozy at home.nature has given us many natural resources,which can be used for generating energy. Wind is one of them. Make a Windmill with the material thermocol,shoe box or any other box,card-board,coloured paper etc. See the pictures

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13 GK Q-1 -Make a project work on RIO OLYMPICS 2016.The project work must include the following A-Introduction. B-Opening ceremony. C-Countries participating in Rio O lympics D-Achievements of Indian players. E Number of games that are included in RIO OLYMPICS F-closing ceremony. G-Conclusion. NOTE- 1-The project work to be done on a separate file. 2-The project must include pictures related to the topic.

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