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44Incorrect

46Word search Time!Click for word search!What is your definition of Energy?

4Facts about Energy!

Only 10% of energy in a light bulb is used to create light. Ninety percent of a light bulbs energy creates heat. Compact fluorescent light bulbs (CFLs), on the other hand, use about 80% less electricity than conventional bulbs and last up to 12 times as long.Google accounts for roughly 0.013% of the worlds energy use. It uses enough energy to continuously power 200,000 homes.According to Google, the energy it takes to conduct 100 searches on its site is equivalent to a 60-watt light bulb burning for 28 minutes. Google uses about 0.0003 kWh of energy to answer the avenge search query, which translates into about 0.2 g of carbon dioxide released

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6Tell me your facts about Energy!

7Information about energy

8Solar energySolar cells are devices that convert light energy directly into electrical energy. You may have seen small solar cells in calculators. Larger arrays of solar cells are used to power road signs in remote areas, and even larger arrays are used to power satellites in orbit around Earth.Solar panels do not generate electricity, but rather they heat up water. They are often located on the roofs of buildings where they can receive heat energy from the sun.Cold water is pumped up to the solar panel, there it heats up and is transferred to a storage tank.A pump pushes cold water from the storage tank through pipes in the solar panel. The water is heated by heat energy from the sun and returns to the tank. In some systems, a conventional boiler may be used to increase the temperature of the water.

9Wind energyWind turbines have huge blades mounted on a tall tower. The blades are connected to a nacelleor housing that contains gears linked to a generator. As the wind blows, it transfers some of its kinetic energy to the blades, which turn and drive the generator. Several wind turbines may be grouped together in windy locations to form wind farms. Wind is a renewable energy resource and there are no fuel costs. No harmful polluting gases are produced. On the other hand, wind farms are noisy and may spoil the view for people living near them. The amount of electricity generated depends on the strength of the wind - if there is no wind, there is no electricity.

10Hydro energyWave energyThe water in the sea rises and falls because of waves on the surface.Wave machines use the kinetic energy in this movementto drive electricity generators.Tidal barrageHuge amounts of water move in and out of river mouths each day because of the tides. A tidal barrage isa barrier built over a river estuaryto make use of the kinetic energy in the moving water. The barrage contains electricity generators, which are driven by the water rushing through tubes in the barrage.Hydroelectric power (HEP)Like tidal barrages, hydroelectric power stations use the kinetic energy in moving water. But the water comes from behind a dam built across a river valley. The water high up behind the dam containsgravitational potential energy. This is transferred to kinetic energy as the water rushes down through tubes inside the dam. The moving water drives electrical generators, which may be built inside the dam.

11BiomassBiomass energy is generated from decaying plant or animal waste.It can also be an organic material which is burned to provide energy, eg heat, or electricity.An example of biomass energy is oilseed rape (yellow flowers you see in the UK in summer), which produces oil.After treatment with chemicals it can be used as a fuel in diesel engines.It is a cheap and readily available source of energy.If the crops are replaced, biomass can be a long-term, sustainable energy source.When burned, it gives off atmospheric pollutants, including greenhouse gases. If crops arenot replanted, biomass is a non-renewable resource.

12The fossil fuels arecoal, oil and natural gas. They are fuels because theyrelease heat energywhen they are burned. They are fossil fuels because they wereformed from the remains of living organismsmillions of years ago.About three-quarters of the electricity generated in the UK comes from power stations fuelled by fossil fuels. To the right is an energy transfer diagram for the generation of electricity from a fossil fuel such as coal.Fossil fuels are non-renewable energy resources.Their supply is limited and they will eventually run out. Fossil fuels do not renew themselves, while fuels such as wood can be renewed endlessly.Fossil fuelsrelease carbon dioxide when they burn, which adds to the greenhouse effect and increases global warming. Of the three fossil fuels, for a given amount of energy released, coal produces the most carbon dioxide and natural gas produces the least.Coal and oilrelease sulfur dioxide gas when they burn, which causes breathing problems for living creatures and contributes to acid rain.

13Nuclear energyThe main nuclear fuels are uranium and plutonium, both of which are radioactive metals. Nuclear fuels are not burned to release energy. Instead, heat is released from changes in thenucleus.Just as with power stations burning fossil fuels, the heat energy is used to boil water. Thekinetic energyin the expanding steam spins turbines, which drive generators to produce electricity.Unlike fossil fuels, nuclear fuels do not produce carbon dioxide.Like fossil fuels, nuclear fuels are non-renewable energy resources. And if there is an accident, large amounts of radioactive material could be released into the environment. In addition, nuclear waste remains radioactive and is hazardous to health for thousands of years. It must be stored safely.

14Quiz Time about Energy !

15Which of these facts did I put in this PowerPoint?According to Google, the energy it takes to conduct 100 searches on its site is equivalent to a 60-watt light bulb burning for 28 minutes. Google uses about 0.0003 kWh of energy to answer the avenge search query, which translates into about 0.2 g of carbon dioxide releasedFrom 2008 to 2030, world energy consumption is expected to increase more than 55%.

16Definition of lightThe natural agent that stimulates sight and makes things visible.26What is your definition of light?

27Quotes about LightWalking with a friend in the dark is better than walking alone in the light.It is during our darkest moments that we must focus to see the light.

No matter what you're going through, there's a light at the end of the tunnel and it may seem hard to get to it but you can do it and just keep working towards it and you'll find the positive side of things.

A smile is the light in your window that tells others that there is a caring, sharing person inside.

Darkness cannot drive out darkness; only light can do that. Hate cannot drive out hate; only love can do that.

Do you know any famous quotes about Light?

30Information about LightLight wavesType of waveTransverseCan they travel through matter (solids, liquids and gases)?Yes (if transparent or translucent)Can they travel through a vacuum?YesHow are they detected?Eyes, camerasCan they be reflected?YesCan they be refracted?YesLight travels as waves. These aretransversewaves, like the ripples in a tank of water. The direction of vibration in the waves is at 90 to the direction that the light travels.Light travels extremely quickly. Its maximum speed is approximately 300,000,000 m/s, when it travels through a vacuum.31More information about LightThe very large difference between the speed of light in air (almost 300,000,000 m/s) and the speed of sound in air (343 m/s) explains why you:see lightning before you hear itsee a firework explode before you hear itsee a distant door slam before you hear itWhen light reaches a mirror, it reflects off the surface of the mirror. This is known as refractionColour

White light is a mixture of many different colours, each with a different frequency. White light can be split up into aspectrumof these colours using a prism, a triangular block of glass or Perspex.Light is refracted when it enters the prism, and each colour is refracted by a different amount. This means that the light leaving the prism is spread out into its different colours, a process calleddispersion.

Colour

Here are the seven colours of the spectrum listed in order of their frequency, from the lowest frequency (fewest waves per second) to the highest frequency (most waves per second):redorangeyellowgreenblueindigovioletThis mnemonic is one way to remember the order: Richard Of York Gave Battle In Vain.Colour

The way coloured light mixes is very different from the way that paint does.When light hits a surface, some of it is absorbed and some of it is reflected. The light that is reflected is the colour of the object in that light. For example, a blue object absorbs all the colours of the spectrum except blue: it reflects blue light.Tell me what do you know about Light?

Quiz Time about Light!

Which of these is the mnemonic I mentioned Richard Of York Got Buggered In VeniceRichard Of York Gave Battle In VainWhat did you think about my presentation?

What can I improve?

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