Lesson 1: Patterns of energy useWhat you need to know:  1. What primary and secondary sources of energy are.  2. How energ...
In the future more and more people all over the world will want to use    electricity, which means the demand for electric...
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P6 patterns-of-energy-use

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P6 patterns-of-energy-use

  1. 1. Lesson 1: Patterns of energy useWhat you need to know: 1. What primary and secondary sources of energy are. 2. How energy use can affect the climate. Every day humans use different types of energy sources, such as fossil fuels in cars, natural gas to cook with and electricity to make computers work. Energy sources can be either a primary energy or a secondary energy source.  Primary energy source: This is an energy source that already exists in nature, such as a fossil fuel (coal, natural gas, oil), which can be used directly to get the energy you need. An example is using gas in your boiler to produce heat.  Secondary energy source: This is an energy source which does not exist in nature but is produced from a primary energy source, such as electricity generated from the burning of fossil fuels. An example of this is using electricity generated from coal to run your computer. In your exam you may be asked to describe what a primary and secondary energy source is. Electricity is produced in a power station and reaches your home through a network of electrical cables called the National grid. When you turn your computer on, you require electricity from the national grid, this is a bit like turning on a tap and getting water. As you can imagine, the demand for electricity changes through the day and has peaks and troughs. Believe it or not, the biggest demand for electricity is usually during the advertisement breaks for popular TV shows like the X factor! Lots of people decide to go and make a cup of tea during the break, meaning that thousands of kettles suddenly need electricity from the national grid. This means that the national grid must be able to supply the demand. In your exam you may be asked how electricity reaches your home. Sadly, generating electricity is neither efficient or clean. Most of the electricity generated in the UK comes from fossil fuelled power stations, and this releases carbon dioxide (CO2) into the atmosphere, adding to the problem of climate change. Burning fossil fuels to produce electricity is also very wasteful, and around half the energy from burning fossil fuels in power stations is wasted. In your exam you may be asked what are the problems when producing electricity from primary energy sources. © Studydoctor 2009
  2. 2. In the future more and more people all over the world will want to use electricity, which means the demand for electricity will increase. The problem is the more electricity humans produce and use from primary sources such as fossil fuels, the more CO2 will be released into the atmosphere, contributing to climate change. Governments are now trying to use alternative energy sources, such as wind, solar and nuclear power, to produce electricity because they produce no CO2. In your exam you may be asked to name some alternative energy sources that can be used to generate electricity without producing CO 2.Recap: 1. A primary energy source is a source that already exists, such as a fossil fuel. 2. A secondary energy source is generated from a primary energy source. 3. The national grid supplies energy, generated in power stations to your home. 4. Electricity produced from fossil fuels creates CO2, making climate change worse. 5. Governments are looking to use alternative energy sources to produce electricity. © Studydoctor 2009

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