Renewable energy.

Renewable energy I am an environmentalist who is in favor of using renewable sources of energy rather than non - renewable sources. There are several types of renewable resources of energy. . Solar energy. 2. Wind energy. 3. Hydroelectric energy. 4. Geothermal energy. 5. Biomass energy. It is better to use renewable resources of energy rather than non - renewable sources in the long term. Eventually the limited supplies of non renewable sources of energy will finish. You would then need to find another mean. Why wait for the non renewable source of energy to finish instead we can use renewable sources of energies. All renewable source power stations do not produce emissions that pollute the environment. The damage done to the environment is quite small compared to that of non renewable powered stations. Using renewable energy reduces pollution, conserve land, and to save money. Renewable energy conserves natural resources by reducing the need for non - renewable energy. Some natural resources are renewable, meaning they can be replaced, and some are not. Paper, corrugated board, and other paper products come from renewable timber sources. Trees harvested to make those products can be replaced by growing more trees. Iron and aluminum come from nonrenewable ore deposits. Once a deposit is mined, it cannot be replaced. The natural resources such as trees form biomass

  • Word count: 546
  • Level: AS and A Level
  • Subject: Science
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Social Science

"The kitchen is the busiest room in the house." A kitchen is also a room that consumes the most energy in the whole house, about 20-40% of the home's energy use. From anything to a microwave to a refrigerator will consume valuable energy that can have a great impact on the environment. As technology grows scientists and manufacturers have researched new, ways and new products that will enforce energy savings that will not only help the environment, but will also save you money in your energy bill. As you may know global warming is becoming to be of great concern, as the earth is slowly getting warmer. In fact, the 1980s and the 1990s were the warmest decades ever, and there is no doubt that it will get worse in the 2000s. To lower the amount of greenhouse gas emissions that create global warming we must lower the energy use in our vehicles, industries, and of course homes. One of the easiest things humans can do is to adjust their energy use through not only more efficient appliances, but also how we use those appliances on a day-to-day basis. In this project, I will be designing a kitchen that is environmentally friendly, and meets the needs of the average family of three. Problem Statement- Energy Star Appliances can create a more economical kitchen. Question-What specific appliances and components create kitchen that is environmentally friendly, yet suitable

  • Word count: 4011
  • Level: AS and A Level
  • Subject: Science
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Solar Energy

Life is sustained by the energy from the sun. Without the sun all plants and animals would die. The sun provides 99.98% of the energy, which naturally flows through the surface environment of the earth. Put another way, the sun supplies 5000 times more energy than all other sources combined. This emphasizes the importance of solar energy to us. Solar energy arrives at the earth at 170 thousand million joules every second! About 30% of the radiation energy is reflected straight back into space. The icecaps and particles in the atmosphere form good reflectors. It is thought that an increase in the area of ice covering the surface of the earth, or an increase in atmospheric dust might reflect even more radiation back into space and so cause the earth to cool towards another ice age. About 47% of solar radiation is absorbed and converted into heat energy or internal energy. During the day the earth's surface is warmed up, and during the night this energy is radiated back into space as radiant heat energy. About 23% of solar radiation is absorbed causing evaporation of water from the oceans and lakes and from the land and plants. The high latent heat of vaporization of water means that a lot of absorbed radiant heat energy is used to convert liquid water into the atmosphere where it forms clouds. Much of this energy then becomes stored as a potential energy in glaciers and

  • Word count: 543
  • Level: AS and A Level
  • Subject: Science
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Nitrogen Cycle

Nitrogen Cycle Most nitrogen is found in the atmosphere. The nitrogen cycle is the process by which atmospheric nitrogen is converted to ammonia or nitrates. Nitrogen is essential to all living systems. To become a part of an organism, nitrogen must first be fixed or combined with oxygen or hydrogen. Nitrogen is removed from the atmosphere by lightening and nitrogen fixing bacteria. During electrical storms, large amounts of nitrogen are oxidized and united with water to produce an acid which is carried to the earth in rain producing nitrates. Nitrates are taken up by plants and are converted to proteins. Then the nitrogen passes through the food chain from plants to herbivores to carnivores. When plants and animals eventually die, the nitrogen compounds are broken down giving ammonia (ammonification). Some of the ammonia is taken up by the plants; some is dissolved in water or held in the soil where bacteria convert it to nitrates (nitrification). Nitrates may be stored in humus or leached from the soil and carried to lakes and streams. It may also be converted to free nitrogen (denitrification) and returned to the atmosphere. The nitrogen cycle is one of the most difficult of the cycles to learn, simply because there are so many important forms of nitrogen, and because organisms are responsible for each of the introversions. Remember that nitrogen is critically

  • Word count: 1281
  • Level: AS and A Level
  • Subject: Science
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Use of a Redox Indicator to show Dehydrogenase Activity

Use of a Redox Indicator to show Dehydrogenase Activity Hypothesis: As the temperature increases, the time taken for the colour change to occur will decrease. Introduction: Triphenyl tetrazolium chloride (also known as T.T.C) is an example of an artificial hydrogen acceptor. It is a redox indicator which is colourless when oxidised, however when reduced, it produces a red, insoluble precipitate called 'formazans'. T.T.C can therefore be used to investigate the enzyme activity of dehyrogenase enzymes by showing a colour change when they are present. The purpose of this experiment is to see what effect temperature has on the activity of dehydrogenase enzymes within yeast cells. Materials/Apparatus: * Actively respiring yeast suspension. This is prepared by adding 10g of dried yeast to 1dm3 of distilled water, followed by mixing in 50g of glucose. This mixture should be allowed to stand for 24 hours before the experiment takes place. * Tiphenyl tetrazolium chloride is used as a redox indicator to investigate the activity of dehydrogenase enzymes when yeast suspension is exposed to different temperatures. * Distilled water for the preparation of the yeast suspension. * Test tubes to place the mixture of yeast and T.T.C. * Test tube rack to allow the test tubes to stand upright in the water baths. * Incubator to allow enzyme activity to occur at different temperatures *

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  • Word count: 825
  • Level: AS and A Level
  • Subject: Science
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