Topic P3 Sustainable Energy Homework booklet

Transcription

1 Name Key terms and spellings on back page Topic P3 Sustainable Energy Homework booklet Due Date Teacher Comment Homework 1 Homework 2 Homework 3 Homework 4

2 Homework One: Energy and Power Stations Add these labels to the diagram above Fossil fuel arrives by train or lorry Fuel is burned in the furnace Water is turned to steam in the boiler Generator makes electricity Steam turns the turbines Transformer changes the voltage Steam is cooled in cooling towers Pollutants leave via the chimney Label each energy source with its name.

3 Write each from above source in the correct place in the table. Primary Energy Sources Secondary Energy Sources Explain why electricity is a secondary energy source From the sources on this page, list three fossil fuels a. b. c. Match the sentence to where in the power station it happens Chemical energy turns to heat energy Heat energy turns to kinetic energy Kinetic energy turns to electrical energy Water is condensed Carbon dioxide is added to the atmosphere The voltage is stepped up (increased) Generator Transformer Cooling tower Chimney Furnace Turbine Add labels for each of these descriptions Fuel is burnt. Chemical energy stored in fuel is released as heat and used to turn water to steam. Steam is used to turn the blades on a turbine. The cooling towers turn the steam back to water. The spinning turbine is used to power the generator which converts kinetic energy into electrical energy.

4 Homework Two: Electrical Power Each of these appliances run on mains electricity (230V) Calculate the current that each appliance draws. For each calculation you must: a) Write out the equation you will use b) Show your working c) Give the correct units for each answer d) Underline each answer T.V. Power = 60W Washing Machine Power = 2700W laptop Power = 70W Microwave Power = 1150W Oven Power = 5500W Using the same rules as above, work out how much it would cost to leave the TV playing all day (24 hours) for a week. 1 kwhr costs 12p

5 Homework Three: References and Reports Skill A(a) / 4 Skill C(a) / 8 This task is to research the use of Elephant Grass as a biofuel. You will need to research this task and record the full address of any website you use. In your written report you will need to answer the following questions although the report should not be in a simple question and answer style but as an essay style answer. This means that each of your paragraphs is likely to answer one of the questions. 1. What is a biofuel and why are they becoming more popular? 2. How can elephant grass be used as a fuel? 3. What are the advantages of using elephant grass over a fossil fuel? 4. What disadvantages are there are of using elephant grass as a fuel? 5. Do you think that using elephant grass as a fuel is a good idea? Success criteria: Mark range Using information effectively Skill A(a) Criteria met Only unconfirmed source(s) of information used ie google or bbc news At least 2 sources of information have been identified, one for each side of the argument Information has been found and used that represent both sides of the argument Has found informative and factual sources of information that represent balanced coverage of the issues Mark range Using scientific knowledge Skill C(a) Criteria met To improve you need to: Little or no scientific evidence presented. The questions are barely answered or information is presented as question then answer rather than essay style There is clear evidence presented for and against the use of elephant grass as a biofuel. The report is structured, at least in part, in an essay style The evidence is compared to arrive at a conclusion based upon scientific evidence. The report is well structured The evidence is compared and used to back up or refute counterclaims. The report is well structured and clearly written in consistent style

6 Homework Four Look back over your work or use a revision book to answer all these questions. Calculations MUST show working no working, no marks! 1 Name two primary energy sources 2 Name a secondary energy source 3 Name three fossil fuels 4 In a conventional power station, where is electricity produced? 5 Draw a diagram to show the difference between irradiation and contamination 6 What does radioactive waste emit that makes it hazardous? 7 Name two polluting gases produced by fossil fuel power stations 8 Name two non-renewable energy sources 9 What units is power measured in? 10 How many joules of energy does a 70W laptop use every second? 11 Calculate the power of a 230V, 0.5A hairdryer 12 What voltage is mains electricity? 13 Draw a labelled Sankey diagram (energy arrow) for a hairdryer? 14 How many kilowatts are 3500W? 15 How many kilowatts are 30W? 16 How many kwhr (kilowatt hours) are used by a 100W laptop in 2 hours? 17 How many kwhr are used by a 1200W hairdryer in 15 minutes? 18 A 60W laptop draws a current of 0.5A. What voltage does it operate at?

7 19 Why are scientists concerned about the level of carbon dioxide in the atmosphere? 20 A particular power station operates at an efficiency of 37%. For every 100J of chemical energy that enter the power station: a) How many joules of electrical energy are produced? b) How many joules are wasted? 21 An electric drill uses 400J of energy and produces 280J of useful kinetic energy. Calculate the efficiency of the drill. 22 A light bulb uses 60J in 4 seconds. What is the power of the bulb? The charts show the different proportions of primary fuels used to generate electricity in Britain in 2007 and Source: Department of Energy and Climate Change, Digest of UK Energy Stats 2009 There are differences between them, even though only one year separated the two sets of data. Suggest and explain how the different proportions used to generate electricity might change by the year You should consider economic and environmental issues in your answer. The quality of written communication will be assessed in you answer to this question. [6]

8 Key terms, spellings and equations biofuel boiler cancer carbon dioxide emissions cell death climate change coal contamination conventional power station cooling tower current economic impact efficiency energy demand environmental impact fossil fuel furnace gas (methane) generator geothermal global warming hydroelectric ionising radiation irradiation joule (J) kilowatt hours (kwhr) magnet mains voltage (230V) National Grid nuclear oil (crude oil) power power station primary energy source radioactive waste rate of energy transfer renewable Sankey diagram secondary energy source solar turbine voltage wave watt(s) wind power = voltage x current energy transferred = power x time efficiency = x 100