Naturales tema 8
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Transcript of Naturales tema 8
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ENERGYUNIT 8Ángel Ayuso-Morales MoyaMaestro Juan de Ávila
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FORMS OF ENERGY
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SOUND
*Sound is a vibration and can travel in any direction from the source.*Vibrating objects transmit these vibratons into the air.*Large vibrations -> loud sound*Small vibratons-> soft sounds
*Sound can travel through gases, liguids ando solids, even if they are opaque
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CHEMICALChemical energy is released when a chemical reacton occurs
A Chemical reaction occurs between the petrol and oxigen
This chemical energy is then transformed into kinetic energy
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KINETIC
All moving things, from large planets to tiny atoms, have kinetic energy.
This energy is produced througt motion or movement
The havier an object is, and the faster it moves, the more kinetic energy it has
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ELECTRICAL
Electrial energy is used to power machine.
We can transform it into light, sound, heat and movement
A lot of our electricity is still procuced by burning fossil fuels
Electricity can also be generated using energy from sunlight, wind, water and biomass.
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THERMAL
Thermal energy flows from a warm substance to a cooler substance, This flow is called heat
A change in the thermal energy of a substance can also make the substance cange state
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SOLAR
This energy is renewable and doesn´t pollute
However solar panels can only be used in sunny climates
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WIND
This energy is clean and renewable but wind turbines only work in windy places
They can also damage habitasts and kill birds
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WATER
This energy is renewable and doesn´t create pollution, but the construction of dams damges habitats and causes biodiversity loss
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BIOMASS
Organic m material derived from living thing wood, dried vegetation, food waste
Biomas is burned -> steam produce turs turbine -> electricity
Causes air pollution
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GEOTHERMAL
Heat produce by the decompesion of undergraund radioactive.
Dosen’t pollute Limited to certain geographic ares
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FOSSIL FUELS
COAL
OIL
*Pollutes*Produces lots of energy
*Oil spills can cause ecological disasters*Easy to transport ans store
NATURAL GAS
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uranium
Nuclear power stations use a radioactive metal to generate electricity
We have enought to generate electricity for many centuries
Stations * Are expensive * Produce radioactive waste products (can cause cancer)
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ELECTRICITY
Insulators(wood, rubber, cotton,plastic)
Conductors(copper, aluminium)
StaticIt´s a form of electricity that doesn´t flow (lightning, hair after brusihing it)
CURRENTIt’s when an electrical charge moves flow) in an electrical conductor
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MAGNETISMA magnet is an object which can attract certain metals (iron abd mixtures of iron). They can natural (magnetite) or mam-made