• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Energy Presentation Notes

Extracts from this document...

Introduction

Energy Presentation Notes Name: ____ The big picture: 1. Energy is defined as: ____ability to do work_____________ 2. Most energy resources on Earth originally derived their energy from the ___sun__. For each of the following identify their connection to the sun's energy. a. Fossil fuels __photosynthesis fueled plant growth which then decayed______ b. Wind ___sun heats the atmosphere causing convection currents____________ c. Hydroelectric/tidal _____________________________________________ 3. Ideal fuel sources are high in Potential energy. Potential energy is _stored_ energy. Identified where the potential energy is stored in each of the following fuel sources. a. Fossil fuels (oil/coal/methane) ___chemical bonds of molecules_______ b. Nuclear _____binding energy in nucleus & mass --> energy conversion_______ c. Hydroelectric _____height differential and gravity_____________ 4. Kinetic energy is energy of __movement__ and can be used to do work. 5. To compare fuel sources it is important to evaluate costs, availability, efficiency and environmental impacts. Fossil Fuels: 1. The three major fossil fuels used in energy production are: _coal, petroleum & methane_ 2. Which one is formed primarily from aerobic decomposition of plants underground fossilized over millions of years? _coal_ 3. Which one is formed primarily from anaerobic decomposition of marine plants and animals under pressure over millions of years? ...read more.

Middle

12. Half-life is defined as: _amount of time it takes for half of the nuclei to decay_ 13. The main disadvantage to nuclear energy is the production of nuclear waste in the form of spent fuel and primary coolant. Give examples of how these materials are stored. Buried in salt mines, encased in ceramic materials, stored in pools of water. 14. What are the major advantages of nuclear energy? After large initial startup costs, fairly inexpensive to run. Large amount of energy for small amount of fuel. Relatively safe if safety and maintenance procedures are followed. 15. What are the major disadvantages of nuclear energy? Disposal of radioactive waste, safety and possible terrorism. 16. Nuclear fusion also produces extremely large amounts of energy. Fusion involves combining two __light__ nuclei to make a larger nuclei. Balance this fusion reaction; _2_ 2H --> _1_3He + _1_1n + Energy 17. Nuclear fusion is not currently feasible. What is the major technological problem that must be overcome? Containment, heat will melt most materials and magnetic containment requires a large amount of energy (currently more than they get out). 18. What are the advantages to nuclear fusion? No radioactive waste and unlimited supply of fuel. ...read more.

Conclusion

Unlimited supply and efficient Disadvantages Variability of source, wind generators are expensive, and noise. Still contribute to global warming when burned. Expensive, can produce hydrogen sufides and geographically limited. Limitations geographically dependent for efficiency. Crops take up large amount of space that it normally used for food production. Must have easily accessible geothermal vents., can trigger small earthquakes. 2. Even though alternative fuels play a small roll in overall energy production, why is it important to continue to promote their research and production? Anything that would reduce of power from the main power grid, and therefore our dependence on fossil fuels, will reduce pollutants and greenhouse gases. It would also allow countries to be more energy independent. Conclusions: 1. Which energy sources are least polluting and environmentally friendly? Solar, wind and hydroelectric. 2. Which energy sources produce electricity most efficiently? Nuclear and hydroelectric 3. Which energy sources produce electricity most cheaply? Fossil fuels 4. Why is it so difficult to reduce our dependence on fossil fuels? They are already in wide spread use so the technology is relatively inexpensive. There are large deposits around the world. Loss of jobs and political pressure. 5. What is being done to offset the environmental issues with respect to fossil fuels? Industries are required to implement pollution reduction methods and alternative fuel sources and technologies are being explored. 6. What more can/should we be doing? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    To make sure we have plenty of energy in the future, it's up to ...

    4 star(s)

    Natural gas is usually found near petroleum underground. The natural gas is pumped from below ground and sent in large pipelines like the ones to the right. Natural gas usually has no odour and you can't see it. Before it is sent to the pipelines and storage tanks, it is mixed with a chemical that gives a strong odour.

  2. Marked by a teacher

    'An investigation into the ability of two strains of the yeast Saccharomyces cerevisiae to ...

    4 star(s)

    With a small number of repeats anomalous results are also harder to spot and discount. A key modification made to the method in light of the pilot experiment, was the fermentation period. Only three hours fermentation time was allocated, and as a consequence, the results obtained seemed to be fairly insignificant.

  1. Marked by a teacher

    Find the relationship between amount of fat and amount of energy produced in different ...

    4 star(s)

    The basic laboratory rules must be abided. There should be no running, or immature behaviour (squirting of water) as this is very dangerous and could cause someone to fall and risk their own health as well as others'. Prediction I predict that by changing the type of food, the amount of energy per gram will change.

  2. Energy absorbed by a bouncing ball.

    The results of the tennis ball and the basket ball are similar in this graph as well. The results overlap towards the higher initial heights. There are a few obvious anomalies in each of the graphs and they can be seen clearly.

  1. Why the Body Needs Energy? Every living cell within the ...

    blood around the body therefore the blood goes from the heat, were the blood is pumped to the parts of the body that needs oxygen and takes the blood back to the heart again. Blood vessels are very valuable because it carries and transport blood, oxygen, nutrients and electrolytes and

  2. The Pancreas is a large gland that forms part of the Endocrine System, but ...

    Below is a list of other causes of Chronic Pancreatitis: * Blocked/Narrowed Pancreatic Duct * Hereditary or * Unknown (this is referred to as Diopathic) The pancreas is one of the organs that are part of the digestive system. The epithelial cells, which are divided into two main types, acinar and duct cells.

  1. chemistry of renewable resources

    countries), the use of food as animal feed, the under-utilized agricultural production potential, the increased potential for agricultural productivity, and the advantages and disadvantages of producing biofuels. 2 there are costs. Concerns about environmental impacts, reliance on foreign supplies, and depletion of domestic reserves have led to calls for increased

  2. Weed study. Dandelions - descrption and characteristics. Investigation to dandelion distribution.

    To attain accurate and efficient results I will have to carry out an experiment, where I have to plan. I decided on how to implement my experiment. (I will justify in my method, which steps I took). There are many methods, which I can use to implement my investigation.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work