Chapter 17 Enegry

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Examples of fossils
Coal, oil and natrual gas. Other fossil fuels include peat and lignite however they are used in large quantities
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A defintion of fossil fuel
Is the reamins of dead plants and animals over millions of years
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Plant remains produce what type of fossil fuel
Coal
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Animal remains produce....
Oil and natural gas
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What does non renewable mean
The resource will eventually run of the earths stores
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What sea havehas ireland mostly recently exploited natual gas reserves in
Celtic sea
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Northern Ireland has deposists of what around the crumlin and ballycadtle area
Lignite
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Why hasn’t these deposits been exploited yet
as open cast mining would be required causing noise pollution and dust pollution. Also destory the natural landscape of the area
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What are some advantages of commercial development of lignite
Increasesed employment, a stronger local economy and cheaper fuels
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What is the disadvantage of burning fossils fuels
Produces carbon dioxide which contributes to global warming
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Why are we using more fossils fuels
Developing countries are becoming industrialised and require fuel and electricity. Increased number of cars and other vehicles
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Examples of renewable energy sources
Tidal, geothermal, wind, solar and hydroelectric
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What does the efficiency of any device describe
How good it is at transferring enegry in the intended way
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Efficiency =
Useful energy output/ total Enegry input x100
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Light bulbs produce light but what else does it produce that is NOT useful
Heat
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A traditional light bulb is not efficient has it produces more heat than light. Give an alternative
Energy-saving light bulbs
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Energy can neither be.....
Created nor destroyed but changed form
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Where does the destroyed enrgry go
Transferred to the Surrounding as heat
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This causes the the environment to become
Warmer
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What dies this do to enegry
Becoming more and more diluted and hence less useful
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Biofuel can be produced from what
Oil extracted from the seeds in oilseed ****
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Why does biofuel contribute less to the greenhouse effect
Carbon neutral- the plants that they are made from take in as much co2 as when the fuel is burned
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What two countries produces gasohol
Brazil and thailand
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How do they make gashol
Adding acohol to petrol
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What are some examples of biomass that alcohol is made from
Sugar beet, rice, wheat, barley, sugar cane. Other new fuels include use of hyrdogen gas and acohol
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What is a incandest light bulb
Trdaitional light bulb which is not Enegry efficient
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Londin buses used what system
Regnerative braking system
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How does the regberative braking system work
The buses have electrical generators attached to the wheels. The buses breaked its kinetic engery converted to electcity which recharged the battery
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Give an example of a car make that have ordinary petrol engine and voltage re-chargeable battery
Toyota prius
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Describe the engery conversation in batteries
Chemical to electrical
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A car using a cell is called what
Electrical car- adding fuel only when needed
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Fuel cells can use many different chemicals name one
Methanol. - produced from renewable bio mass- the use of renewable methanol replaces the fossil fuels
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Inside the cell methanol burns to produce electricity. What are the waste products
Carbon dioxide, water and heat
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Weight is measured in
Newtons
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The weight of one kg on earth is about
10N
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Enegry is meausred
Joules
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Why cant a machines never be 100% efficient
Enegry cannot be created nor destroyed
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Friction between the moving parts causes heat. How can we avoid this
Add lubricant the moving parts ro reduce friction
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The resistance of a wire causes the wire to go hot when a current passes through it. How can we avoid this
Use as little electrical resistance as possible
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Air resistance engery transfer to the surroundings. How can we avoid this
Streamline the shapes of moving objects to reduce the air resistance
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Sound created by machinery causes energy transfer. How can we avoid this
Cut out the noise: tighten the loose parts to reduce friction
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Other cards in this set

Card 2

Front

A defintion of fossil fuel

Back

Is the reamins of dead plants and animals over millions of years

Card 3

Front

Plant remains produce what type of fossil fuel

Back

Preview of the front of card 3

Card 4

Front

Animal remains produce....

Back

Preview of the front of card 4

Card 5

Front

What does non renewable mean

Back

Preview of the front of card 5
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