Aim Determining the identity of an unknown metal. Measurement of gas volume, calculations with gases based on reaction equations. Substances 10% solution of hydrochloric acid, 5,0...10,0 mg piece of a metal. Equipment Apparatus for measuring the volume of gas, measuring cylinder (25 cm 3), funnel, filter paper, thermometer, barometer and hygrometer. Experimental procedure 1. The experimental apparatus (Figure 1) consists of two burettes connected with a rubber hose (a), which is filled with water. One burette is
How can we reduce air pollution level in cities? The air pollution levels are extremely high in cities, but how can people change this situation? Cars and big factories emit lots of deleterious gases into the air, for example carbonic acid gas, cities are not healthy places to live anymore. Firstly, we should using the public transport. Everybody can walk and bicycle instead of driving cars. Vehicles emit a lot of harmful gases into the air. Every family member does not need his or her own car. One car for the whole family would minimise the number of cars in cities and air pollution levels will come down. Secondly, people have to recycle. It would help reduce factories work. It will emit less harmful gases into the air. Finally, we should plant more trees in cities and also create more national parks. They produce oxygen. In conclusion, there are many ways to make cities better places to live
metal arc welding OPERATION Ø Flux covered metal electrode to carry an electrical current Ø The current forms an arc Ø Electrode and work base is melted by the heat produced Ø Molten metal from electrode and the metal pool from base metal mix together Ø Molten metal is protected with slag and gases Shielded metal arc welding GAS METAL ARC WELDING Gas metal Arc welding GENERAL INFO Ø Much higher quality weld than Shielded arc weld Ø Very easy to use Ø Commonly referred to as MIG or MAG Ø Very popular in industrialised environment Ø Often used in automated welding by robots Ø Can not be used in outdoors
How can we reduce air pollution levels in our cities? Is our cities a safe place for us? Tons of harmful gases emit to the air everyday. Factories have caused this problem. We need to do something fast before our city doesn`t become deserted. Firstly, we have to create industrial park. It will help to reduce factories in the cities, where a lot of people live. Another solution is to start stricting the laws. If the laws be very strict, then less and less persons will be able to get a license for the new factory. Finally, we should renovate our factories. Modern plant emit less unhealthy gases
How can we reduce air pollution levels in our cities? Is our cities a safe place for us? Tons of harmful gases emit to the air everyday. Factories have caused this problem. We need to do something fast before our city doesn`t become deserted. Firstly, we have to create industrial park. It will help to reduce factories in the cities, where a lot of people live. Another solution is to start stricting the laws. If the laws be very strict, then less and less persons will be able to get a license for the new factory. Finally, we should renovate our factories. Modern plant emit less unhealthy gases
How and where Northern Lights appear? • Charged particles collide with molecules • Generate a glow • The strongest auroras are quite bright • The aurora occurs above: altitudes of 80 km infrequently above 500 km normal altitudes 110 and 200 How the Lights got their colors? • Every gas creates a different color • neon lights: helium – pink/white neon - red/orange argon - lavender krypton - gray/green The colors of auroras • Determined by gases in the Earth’s atmosphere • Solar particles collide with different gases • Oxygen (300km) – a rare red aurora • Oxygen (100-300km) – yellow-to-green aurora Do the Northern Lights emit sound? • Subject of discussion • Proven that people can hear natural auroral sounds • Energetic particles produce strange „clapping“ noise • Do not occur every northern lights outburst • Usually brief and faint • https://www.youtube.com/watch
pollution - most notably the excessive amounts of sulfur and nitrogen released by cars and industrial processes. Acid rain is also called acid deposition because this term includes other forms of acidic precipitation such as snow. Acidic deposition occurs in two ways: wet and dry. Wet deposition is any form of precipitation that removes acids from the atmosphere and deposits them on the Earth's surface. Dry deposition polluting particles and gases stick to the ground via dust and smoke in the absence of precipitation. This form of deposition is dangerous however because precipitation can eventually wash pollutants into streams, lakes, and rivers. Acidity itself is determined based on the pH level of the water droplets. PH is the scale measuring the amount of acid in the water and liquid. The pH scale ranges from 0 to 14 with lower pH being more acidic while a high pH is alkaline; seven is neutral. Normal rain water is
exhausting. Many parents have lost their jobs because of the virus. And still there are people who won’t listen to the government rules and spread the virus further. Secondly, global warming is increasing at an alarming rate with the progress in technology. In recent years, industrialization and extensive use of automobiles have been observed, and these developments have significantly raised the levels of greenhouse gases in the atmosphere. Moreover, these gases like carbon dioxide and methane trap the sunlight and elevate the temperature of the earth. This change in temperature is not only responsible for global warming but also other associated problems of climate change and air pollution. In conclusion, to ensure positive contributions and to minimize risks to the planet, relying on govenment alone will not lead to the desired results. Each person's effort can effectively help protect the environment.
Acid rains This morning you contributed to atmosphere desolation H ow it is formed? Acid rain is formed by burning fossil fuels such as coal, natural gas, and oil. Gases of acid rain Sulfur dioxide and nitrogen oxide are the gases that form the acid rain. Our health and acid rain Acid rain effects even our health. Breathing and lung problems in people (especially those with asthma) and have been linked to acid air pollution. Some things that you can do to make acid rain less of a problem are: Only run the dishwasher and washing machine with a full load. Turn off the lights in empty rooms or when you will be away from home.
Madis Pokk Facts about Brazil Capital: Brasilia Largest city: Sao Paulo Official language is Protugese Total area: 8 515 767 km² Population is 193 milion people Deforestation cutting down rainforest The highest rate in world of cutting down rainforest Major problem in Brazil Over 600 000 km² destroyed The problems that comes with deforestation New plants can't grow Global warming Life for animal Greenhouse gases Why they are cutting rainforest? More place for new homes To build new roads Selling the lumber to Japan To generate electricity Trees are used in flooring, furniture and other items Make more space for grazing lands Solution To enforce their anti-logging laws Provide alternatives to poor farmers Use less firewood and paper products Recycle old furniture and wood Educate yourself Ari Pollution Second largest environmental problem
temperature of the air and sea at Earth's surface. Since the early 20th century, the global air and sea surface temperature has increased about 0.8 °C (1.4 °F), with about two-thirds of the increase occurring since 1980.Each of the last three decades has been successively warmer at the Earth's surface than any preceding decade since 1850. More than 90% certain that most of global warming was being caused by increasing concentrations of greenhouse gases produced by human activities.In 2010 that finding was recognized by the national science academies of all major industrialized nations. Affirming these findings in 2013, the IPCC stated that the largest driver of global warming is carbon dioxide (CO2) emissions from fossil fuel combustion, cement production, and land use changes such as deforestation. Its 2013 report states:Human influence has been detected in warming of the
Continue to fill the flask until a constant mass (m2) is obtained. Usually the difference between m2 and m1 is about 0,17-0,22 g. Write data into Table 1. Table 1. The mass of a flask. Mass (g) ± 0.005 m1 ( flask + stopper +air ) 148,66g flask + stopper +carbon dioxide 148,82g m2 ¿ ) 5. To find out the volume of the flask (therefore the gases volume), fill the flask with water at room temperature and measure its volume with a 250 cm 3 measuring cylinder. Since all of the water will not fit in the cylinder then measure the amount of water in two sets, afterwards add the two results. 6. Fix the temperature and the pressure in the room with a thermometer and a barometer during the experiment and write the data into Table 2. Table 2. Temperature and pressure measured before starting the experiment
Radiation concentrating installations; radiation concentration installations. Päikesekiirgust kasutavad paigaldised jagunevad: kiirguse kontsentreerimisega paigaldised kiirguse kontsentreerimiseta paigaldised .Solar panels Pluses: Sustainable; decreasing the burning of fossil fuels for energy, as well as the extraction of mineral resources and related environmental impacts no greenhouse gases; In the air is not greenhouse gases. unlimited resource; The sun is abundant, it is free and inexhaustible resources low maintenance costs; runs silently; Solar power system runs silently. Minuses: Needed during daylight; at night can be used only for the stored energy seasonality; During the winter months are the low efficiency of solar panels high price; relatively high resource costs and the high price
· Respiratory responses & adaptations · Move onto the cardiovascular system · Lecture 1 recall task 1) Identify the route that air takes from the atmosphere to the blood (e.g., air enters through the mouth and then...). 2) Explain the mechanism of how air is drawn into the body with reference to Boyle's law and diffusion. 3) With reference to Dalton's law explain why training at altitude can be problematic for athletes. Henry's Law · When a mixture of gases is in contact with a liquid, each gas will dissolve in the liquid in proportion to its partial pressure. · Greater concentration of gas, the more and faster that gas will go into solution in the liquid. · How much gas dissolves in liquid depends on: solubility of the gas in the liquid temperature of the liquid. Did You Know...? The solubility of a gas in blood and the temperature of blood are relatively constant.
Climate change Astrid Linder G1R1 Gases that contribute to the greenhouse effect include: · Water Vapor · Methane · Nitrous · Carbon dioxide Florida Hawaii THANK YOU FOR LISTENING!
Natural resources-our treasure Natural resources are land or raw materials like minerals, fluids, gases, organic matters and also woods, groundwater, animals and so on, in other words it's everything that human hasn't created. These resources are also used in industry. We get natural resources from the environment. Many of them are essential for our survival while others are used for satisfying our wants. Renewable resources: Some natural resources can be reproduced within a few years or decades. These are called renewable resources
What is solar power? Solar power is energy that comes from the sun. The sunlight gives off energy as heat. Solar power is a renewable source of energy. How does solar power work? Solar panels are used to collect sunlight. Solar panels are made up of photovoltaic cells that convert the sunlight into energy. Why do we need it? How does it lead to better health? Solar power is source of clean energy. It does not produce pollution or greenhouse gases or carbon compounds. Solar power would be a lot safer for the environment and a lot better for the health of people. What would happen if we don't use solar power? If we don't start using solar power, we would use oil and coal. They produce pollution and will cause millions of people to suffer from respiratory related problems. The oil and coal will run out and people will have to resort to other ways of power. Solar energy Karol Pakkas
What is solar power? Solar power is energy that comes from the sun. The sunlight gives off energy as heat. Solar power is a renewable source of energy. How does solar power work? Solar panels are used to collect sunlight. Solar panels are made up of photovoltaic cells that convert the sunlight into energy. Why do we need it? How does it lead to better health? Solar power is source of clean energy. It does not produce pollution or greenhouse gases or carbon compounds. Solar power would be a lot safer for the environment and a lot better for the health of people. What would happen if we don't use solar power? If we don't start using solar power, we would use oil and coal. They produce pollution and will cause millions of people to suffer from respiratory related problems. The oil and coal will run out and people will have to resort to other ways of power. Solar energy Karol Pakkas
The Earth's climate has been changing constantly over its history. Once, all climate change occurred naturally, but recently, people have also started altering the climate. We are sending more and more greenhouse gases into the atmosphere. The average global temperature has increased by about 0.5 °C over the past century. Scientist expect it to increase up to an additional 3 °C over the next on 100 years. People who are living in cold places may have a chance to grow new crops if the climate gets warmer. At the same time in some parts of the world, people won't be able to grow the food they need. Global warming will make the sea level higher because it'll make the glaciers melt.
(Kuid kergelt lahustub 20°C a juures) Haruldastel ja ekstreemsetel tingimustel moodustab nõrku, liidetud struktuure. Milleks kasutatakse? Kaitsegaasina metallurgias või kaar- keevituse juures. Segatakse krüptooniga, et teha lasereid. Hõõglampides. Silmakirurgias. https://www.youtube.com/watch?v=i5HjdmVcoDw Kasutatud kirjandus http://en.wikipedia.org/wiki/Argon http://pt.kle.cz/et_EE/argoon.html http://education.jlab.org/itselemental/ele01 8.html http://www.elmemesser.ee/et_ET/gases/argo n http://www.chemistryexplained.com/element s/A-C/Argon.html Tänan tähelepanu eest!
breathable air? “I’ll go out for a breath of fresh air” is an often-heard phrase. But how many of us realize that this has become irrelevant in today’s world? Air pollution is the addition of any harmful substances to the atmosphere, which causes the damaging of the environment, human health and the quality of life. Firstly, we should use green methods of powering like wind energy and landfill gas energy. This would reduce the amount of harmful gases. Another useful suggestion would be to plant trees. In this way we can increase the source of breathable oxygen. Unfortunately, many companies are contributing to deforestation. Finally, it would help if we put taxes on carbon emissions or higher taxes on gasoline. In this way people and companies will have greater incentives to conserve energy and pollute less. In conclusion, there are many ways to pollute the air less. We all
Global warming Global Warming effects on the natural balance of environment Climate significant change day by day What causes it? Greenhouse gases Fuel burning Ozone layer Deforestation traffic clogging up the city streets rapid growth of unplanned industries the use of CFCs in packaging and manufacturing products Detergents Overpopulation Killing animals like birds, big cats, lions, tigers What it causes? Temperature raising Melting polar ice sheets Currents change its circulation e.g. The Gulf Stream El nino Pollution sea-water to swell up. Natural system Animals deaths Sea level rise
To start with, the biggest problem is global warming. The temperature is rising due to air pollution, which is caused by smoke from factories and of rising levels of CO2 . As a result, smog and soot causes health problems. Also, a big problem is deforestation. Due to the fact that it is causing destruction of the rainforest, it contaminates the water. To solve these problems, we certainly should use renewable sources of energy and we need to avoid dangerous gases. For example, we should switch off lights every time when we leave a room. Moreover, we should take public transport more often and stop using CFC's. We can solve environmental problems only if we follow certain rules. that it is causing* ; renewable energy resources*; Therefore, we*; when we leave a room*; Moreover, we should take..* and stop using CFC's* We can solve environmental problems only if we follow certain rules.
69. Operating principle Tööprintsiip 70. To draw (in) Sisse tõmbama 71. Conventional (piston engine) Tavapärane (kolbmootor) 72. Range ulatus 73. Vibration-free Vibratsioonivaba 74. Four-stroke engine neljataktiline mootor 75. Jet engine Reaktiivmootor 76. Rocket engine Raketimootor 77. Piston engine Kolbmootor 78. Intake stroke Sisselasketakt 79. Inlet valve Sisselaskeklapp 80. Compression stroke Survetakt 81. Spark säde 82. Combustion gases põlemisgaasid 83. To push Tõukama 84. Crankshaft Väntvõll 85. Exhaust stroke Väljalasketakt 86. To transmit üle kandma 87. Gearbox käigukast 88. To turn forwards- pöörlema ettepoole 89. Due to - millegi tõttu 90. Combined movement kombineeritud liikumine 91. To turn backwards pöörlena tagurpidi 92. Gear stick käigukang 93. Reverse gear tagasikäik 94. Approximately ligikaudu, umbkaudu 95. Vaporised fuel aurustatud kütus
was built in Scotland in 1887 to power the lighting in the cottage, thus making it the first house in the world to have its electricity supplied by wind power. During the Second World War, small wind generators were to recharge submarine batteries. In the 1990s, wind power became more important, because fossil fuels pollute the atmosphere and humanity needed alternative fuels. That's because wind power is so necessary. Wind power is also renewable energy and it doesn't cause greenhouse gases. Building windmills is actually quite expensive and they need repairing or replacing about every 12-15 years. And strong winds can also break the wind turbines. Considering these things the wind power cost more than the energy from fossil fuels. Also the turbines are unpleasant to look at and if you live near the wind farms then they make a bit noise. Wind farms take a lot of space which you can use for farming. And when the wind doesn't blow then the turbines can't make energy.
ENVIRONMENTAL PROBLEM The term acid rain refers to what scientists call acid deposition. It is caused by airborne acidic pollutants and has highly destructive results. Scientists first discovered acid rain in 1852, when the English chemist Robert Agnus invented the term. From then until now, acid rain has been an issue of intense debate among scientists and policy makers. Acid rain, one of the most important environmental problems of all, cannot be seen. The invisible gases that cause acid rain usually come from automobiles or coal-burning power plants. Acid rain moves easily, affecting locations far beyond those that let out the pollution. As a result, this global pollution issue causes great debates between countries that fight over polluting each other's environments. For years, science studied the true causes of acid rain. Some scientists concluded that human production was primarily responsible, while others cited natural causes as well
Poku and make recommendations based on the opinion poll carried out at Poku. The results of the opinion poll are presented below. Pollution General situation at Poku is satisfactory as the level of water and noise pollution is rather low as there are no big industrial enterprises in the vicinity. Problematic areas are air and litter pollution as many tourists visit the place leaving behind exhaust gases and rubbish on the ground. Wildlife In the forests near Poku there is comparatively rich in wildlife. The only problem seems to be cutting trees which may leave the local animals without their usual habitat. Recycling Recycling of paper and glass is very well organised in the area of Poku. More problematic seems to be recycling of plastic and chemicals as there are no special containers for that kind of waste. Conclusion and recommendations
Challenges of pipelines Accidents Three longest pipelines in the world Nord Stream pipeline First man who suggested to use pipe for transporting petroleum: Dmitri Mendeleev In 1863 Petroleum Pipeline construction Route (right of way) Selection Surveying the route Clearing the route Trenching - Main Route and Crossings (roads, rail, other pipes, etc.) Installing the pipe Installing valves, intersections, etc. Covering the pipe and trench What can transport through the pipeline? Liquids Gases Solid capsules The most popular and valuable: Oil Natural gas A pipeline carries Biofuels crude oil through the deserts of Saudi Arabia Pipelines by purpose Gathering pipelines small diameter, short distances Transportation pipelines big
Volcanic eruption (summaries) 1. Volcanic eruption happens when various gases and lava are discharged from a volcanic vent. The most dangerous type of volcanic eruption is when freshly erupted magma is flowing. During the explosion, magma with rock fragments, flies into the air and then falls down. Magma, which have temperatures over 1200 degrees, may flow further than 40 km from the original disaster site. The lava destroys many building and plants also volcanic ash will harm humans when they breath it in. 2
Humans are changeing the planet with their ordinary life. The principle cause of climate change is the increase in carbon dioxide concentrations in the atmosphere. The main cause of that is the burning of fossile fuels. This is leading to the global warming. People have discovered a way to reduce the amount of CO2 in the atmosphere. It is possible to seperate the CO2 from the other gases by adding liquid which is very good at absorbing CO2. Then it can be pumped to underground. Scientist came up with this idea because methane gas has been down there for thousands of years and it has not come up. So they expect that the CO2 won't be coming up either. To be sure of that, they are coing to make a test and drill two wells to take purified CO2, inject it into the ground and monitor the physical changes that CO2 undergoes. This technology is really new and it is unknown to people
environment and does not contribute to the greenhouse effect and global warming. Non-renewable energy Non-renewable energy comes from sources that can't be replenished in a short period of time. We get most of our energy from nonrenewable energy sources, which include fossil fuels such as oil, natural gas, coal and from nuclear energy. Unfortunately, burning fossil fuels produces greenhouse gases like carbon dioxide and methane which may cause global warming. Wind energy is the world's fastest growing energy technology. Most renewable energy comes either directly or indirectly from the sun. Hydroelectric energy is the oldest and largest source of renewable energy. Renewable energy is also known as "green" energy because, unlike energy created from fossil fuels, it will not run out.
Answers for the IPCC Summary. 1.Radiative forcing is a measure of the influence that a factor has in altering the balance of incoming and outgoing energy in the Earth-atmosphere system and is an index of the importance of the factor as a potential climate change mechanism. 2.The three main things that alter the energy balance of the climate system are the changes in the atmospheric abundance of greenhouse gases and aerosols, in solar radiation and in land surface properties. 3.The two sources for the increased concentration of CO2 in the atmosphere are production, distribution and consumption of fossil fuels and as a by-product from cement production. 4.The two main sources of methane pollution are agriculture and fossil fuel use. 5.Volcanic aerosols are not included to the list because of their episodic nature. 6.The world's oceans absorb more than 80% of heat. 7
The major problems that are facing our country today are air and water pollution and recycle problem. Also we have, for example, deforestation problem and traffic jams, for instance, in Tallinn in rush-hour. Nevertheless, those problems are not so significant than previous. One of the biggest problems in Estonia is air and water pollution. One example of air pollution is exhaust fumes. Today we have a lot of transport: cars and buses, in the main in our capital. Gases which are produced by cars contain carbon dioxide. This carbon dioxide in the air causes global warming, which is the result of the green house effect. Furthermore, it will change our climate. In addition our air is polluted by hydrogen sulfide (H2S) from plants and factors. Substantially, in Kohtla-Järve and Maardu. Our water is also polluted. We can't drink it, because there are a lot of chemical ingredients. In some cities water is chlorine a lot
Air pollution Janne Sinkarev, 8c Air pollution · Natural sources such as: Dust,smoke, volcanic eruption and · What is it? also forest fire. · Air pollution is the introduction of · Anthropogenic sources such as: chemicals, particulate matter, or aerosol sprays, toxic biological materials that cause gases,rocketry and some more for harm or discomfort to humans or millitary use. Also chemicals and other living organisms, or dust. Also transport: cars, motor damages the natural environment vehickles, marine vessels, planes. into the atmosphere. · Air pollution divided into two: Air pollution, which cames by human activity(Anthropogenic sources) and air pollution, which cames by nature(Natural sources)
Municipal dumps are created in the outskirts of the city. People who live near suffer from such neighbourhood. Because strong smell coming from this place. It's also an attractive place for homeless animals, crows, rats and mice. The air round municipal dumps is always contaminated because several items in the dumps are toxic in nature. And those that decompose release toxic into the air, into the soil, and then get into the groundwater. These toxic can be gases like methane, sulfur, nitrogen, carbon monoxide and so on. Municipal dumps are the cause serious diseases and damage crops. These dumps are becoming bigger and bigger. What is the solution to a problem? First of all, people should change their attitude to dumping. Special bins should be put of cans, bottles and paper. Secondly, much more than half of today's trash could be recycled, but 80% of it winds up in landfills
present day solar cell technology, placed on just 2,6% of the Sahara desert. Why don’t we all use the solar energy then ? It would cost about 123 trillion dollars to make such a big solar array that could be capable of powering the planet, plus yearly maintenance. Making the solar panels and their associated hardware would yield about 149 000 megatons of CO2. Wind turbines Advantages: Zero greenhouse gases Free fuel Flexibility Good for remote areas Takes up a small plot of land https:// apps.carleton.edu/reasonpackage/reason_4.0/www/images/6075 9.jpg Wind turbines Disadvantages: Noise disturbances Threat to wildlife Wind is unpredictable Suited to particular regions Visual impact http://
But people produce much refuse and ways of recycling are getting old. Water pollution is also a problem in Estonia. We have factories that let their waste run into rivers. One of the biggest problems in Estonia is air pollution. Our air is polluted by exhaust fumes, because today we have a lot of cars, buses and other machines. In 2009 we had 407 cars to thousand inhabitants, which is lower than European Union average, but this number is still high. Because cars produce gases that contain carbon dioxide. This carbon dioxide in the air causes global warming, which is the result of the greenhouse effect. Tallinn wants to fight against it by offering public transportation for free, to Tallinn citizen. So that people would use more public transportation than their own car. Furthermore, it will change our climate. In addition our air is polluted by hydrogen sulfide from plants and factors (Especially in Kohtla- Järve and Maardu). Other big environment problem is garbage
Electric car (biological cars) ( , . . , .) One of the most common types of pollution are gases that emit vehicles and to prevent this people asked themselves the goal to take in the use of biologically clean vehicle What is it? Electric car - a car driven by one or more electric motors powered by an autonomous power source (battery, fuel cell, etc.) and not the internal combustion engine. First Electric car Electric car appeared before the internal combustion engine. The first electric car in the form of a truck with an electric motor was established in 1841. Limitations
Air pollution Every day, the average person inhales about 20,000 liters of air. Every time we breathe, we risk inhaling dangerous chemicals that have found their way into the air. Air pollution includes all contaminants found in the atmosphere. These dangerous substances can be either in the form of gases or particles. Air pollution can be found both outdoors and indoors. Pollutants can be trapped inside buildings, causing indoor pollution that lasts for a long time. The sources of air pollution are both natural and human-based. As one might expect, humans have been producing increasing amounts of pollution as time has progressed, and they now account for the majority of pollutants released into the air. Air pollution has been a problem throughout history
The Greenhouse Effect: Scientists are sure about the greenhouse effect. They know that greenhouse gases make the Earth warmer by trapping energy in the atmosphere. Climate Change: Climate is the long-term average of a region's weather events lumped together. For example, it's possible that a winter day in Buffalo, New York, could be sunny and mild, but the average weather the climate tells us that Buffalo's winters will mainly be cold and include snow and rain. Climate change represents a change in these long-term weather patterns. They can become warmer or colder
4 have been reported in industrialized areas Industrial acid rain is a substantial problem in Europe, China, Russia and areas down- wind from them These areas all burn sulfur-containing coal to generate heat and electricity The problem of acid rain not only has increased with population and industrial growth, but has become more widespread The use of tall smokestacks to reduce local pollution has contributed to the spread of acid rain by releasing gases into regional atmospheric circulation Often deposition occurs a considerable distance downwind of the emissions, with mountainous regions tending to receive the greatest deposition An example of this effect is the low pH of rain which falls in Scandinavia Effects Many ecosystems are affected by acid rain. Bodies of water, such as lakes and rivers, see many of their inhabitants die off due to rising acidity levels.
- Operating principle Tööprintsiip - To draw (in) Sisse tõmbama - Conventional (piston engine) Tavapärane (kolbmootor) - Range ulatus - Vibration-free Vibratsioonivaba - Four-stroke engine neljataktiline mootor - Jet engine Reaktiivmootor - Rocket engine Raketimootor - Piston engine Kolbmootor - Intake stroke Sisselasketakt - Inlet valve Sisselaskeklapp - Compression stroke Survetakt - Spark säde - Combustion gases põlemisgaasid - To push Tõukama - Crankshaft Väntvõll - Exhaust stroke Väljalasketakt - To ransmit üle kandma - Gearbox käigukast - To turn forwards- pöörlema ettepoole - Due to - millegi tõttu - Combined movement kombineeritud liikumine - To turn backwards pöörlena tagurpidi - Gear stick käigukang - Reverse gear tagasikäik - Approximately ligikaudu, umbkaudu - Vaporised fuel aurustatud kütus
face vastu astuma, silmitsi olema fairy land muinasjutumaa filter filter, sõel fluorescent helendav fossil fuel fossiilkütus (põlevkivi, kivisüsi, nafta vms) fragile habras, õrn frozen külmutatud, jäätunud, tardunud gadget (väike spetsialiseeritud) tööriist, asjandus gas mask gaasimask generate tootma, tekitama global warming globaalne soojenemine (power) grainmill/grain mill teraviljaveski grateful tänulik greenhouse gases kasvuhoone gaasid hold still paigal püsima, vankumatult seisma 1 hue värvitoon, värvus hum ümisema, sumisema, kihama humming fly mesilane hydropower hüdroenergia imagery kujundid, kujundlikkus, kujutlus industrial tööstuslik, tööstus-, töö-, industriaal- inspire inspireerima, vaimustama, sisse hingama insulate isoleerima, eraldama Injuit innuiit, eskimo (Kanadas ja Gröönimaal)
the Mediterranean but only a few times each century. To the north of the auroral zone, the Northern Lights are a common sight, although they don't appear as often as in northern Norway. What exactly are the Northern Lights? The Northern Lights occure when large numbers of electrically charged particles stream towards the Earth along its magnetic field and collide with the highest air particles. The air then lights up. The resulting colours reflect in gases we find up there, the most usual yellow-green colour is coming from oxygen. Red colouring is also due to oxygen with a contribution from nitrogen. The violet we often see is due to nitrogen, as is most blue colouring. The charged particles originate from the sun, and it is the 'weather' conditions on the sun that decide whether or not we will see the aurora. Particles can stream out from the sun and some are captured by the Earth's magnetic field and find their way into the polar regions.
India and China have both invested extensively in creative biogas technology to provide fuel for their citizens and there are a number of interesting applications for this gas which appeal to people who are interested in sustainable energy and the health of the environment. The basis for biogas is organic material such as food scraps and feces which are held in an anaerobic area, which can range from a storage tank which is not ventilated to a device which is specifically designed to produce gases. The conditions attract anaerobic bacteria, which start to break down the organic material, producing methane and carbon dioxide as a by-product. Another type of biogas which includes hydrogen, nitrogen, and carbon monoxide can be obtained through the gasification of biomass such as wood or rice husks, a technique which is used to manufacture gas industrially. The gases produced through anaerobic fermentation or gasification are
4 have been reported in industrialized areas.[2] Industrial acid rain is a substantial problem in Europe, China,[8][9] Russia and areas down- wind from them. These areas all burn sulfur-containing coal to generate heat and electricity.[10] The problem of acid rain not only has increased with population and industrial growth, but has become more widespread. The use of tall smokestacks to reduce local pollution has contributed to the spread of acid rain by releasing gases into regional atmospheric circulation.[11][12] Often deposition occurs a considerable distance downwind of the emissions, with mountainous regions tending to receive the greatest deposition (simply because of their higher rainfall). An example of this effect is the low pH of rain (compared to the local emissions) which falls in Scandinavia. Many ecosystems are affected by acid rain. Bodies of water, such as lakes and rivers, see many of their inhabitants die off due to rising acidity levels
of using fossil fuels and about 1/6 the cost of natural gas. Biofuels · Using natural I Love you Plants materials to turn into fuel or forms of combustible energy. · Which is mostly plants and plant products Cost Efficient? · A study done by OSU So much for the love.... · Going to biofuels would be like adding a new gas tax. About 25 cents. · And it is not proven to reduce green house gases and may even produce more of them. Geothermal Energy -By using heat from the earth's crust in forms of hot water and steam to power generators for electricity The Math? · Geothermal Energy systems are expensive to put in. · But they are able to pay themselves off in 5 to 10 yrs. · Is able to cut the energy bills by 30 to 40%. Overall Good Bad (technology not there yet) · Hydropower · Solar · Geothermal · Wind
proportion of its quantity. therefore the apple draws the earth, as well as the earth draws the apple." It has been said that the apple story is a myth. Theory of gravity · Newton came up with the theory that the centre of the earth was pulling the object down Newton's tree, Botanic Gardens, Cambridge. Newtonian fluid · Water and air are examples of Newtonian fluids, which include most common liquids and gases. NonNewtonian fluid · It's a fluid what is not a really fluid. · solid fluid. NonNewtonian fluid · In pool http://www.youtube.com/watch? v=f2XQ97XHjVw · In slowmotion http://www.youtube.com/watch? v=w4xkvCcAers · on a Speaker Cone http://www.youtube.com/watch? v=3zoTKXXNQIU Newton's theory of color · This theory proved that no matter how colored light is transmitted, reflected or scattered, the colos light still remained the same color
by pollution is uncertain. Acid rain The term acid rain refers to what scientists call acid deposition. It is caused by airborne acidic pollutants and has highly destructive results. Scientists first discovered acid rain in 1852, when the English chemist Robert Agnus invented the term. From then until now, acid rain has been an issue of intense debate among scientists and policy makers. Acid rain, one of the most important environmental problems of all, cannot be seen. The invisible gases that cause acid rain usually come from automobiles or coal-burning power plants. Acid rain moves easily, affecting locations far beyond those that let out the pollution. As a result, this global pollution issue causes great debates between countries that fight over polluting each other's environments. For years, science studied the true causes of acid rain. Some scientists concluded that human production was primarily responsible, while others cited natural causes as well. Recently, more
technologies. In older days we attended events and took care personal; now we are sending sms or giving a call on important occasion. Children are becoming addicted to games, internet, social networks. They do not play together anymore like we used to do, then we were young. They do not know, how to communicate, because they saw only computers, laptops or mobile phones since they were little. The aviation technology, automobiles and other vehicles, releasing unwanted green house gases into the environment, are creating serious environmental problems and pollution and some of them, health problems for their workers. The more time people are spending engrossed in video games, talking to friends online and watching videos, they are spending less time being active or exercising. This lifestyle can bring to obesity, and it, in turn, can lead to serious health problems and even to death. Technology has the negative effects on sleep habits
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