Energy is the ability or capacity of an object to work.
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What is a system?
A system is different parts of an object working together to create a product or achieve a goal.
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Types of energy
Renewable energy and non-renewable energy
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Forms of energy
Potential and kinetic
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Types of systems
Mechanist, animate, social and ecological
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Disadvantages of systems
Some harm the environment
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Advantages of systems
They benefit humans
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Environmentally friendly is...
Having a lifestyle that is better for the environment.
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Renewable energy is...
Energy that will never run out.
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Non-renewable energy is...
Energy that will eventually run out and no longer be available for any usage.
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Types of renewable energy
Bio-energy, geothermal energy, hydroelectricity, solar energy, wind energy, wave energy and tidal energy.
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Bio-energy
Energy produced by biomass meaning organic materials. It comes from fuels that have been derived from plants or animals. It can include cow dung.
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Geothermal energy
It is heat from the earth. Resources are found miles away from hot water and rocks.
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Hydroelectricity
It is the production of electricity through gravitational force like the flowing of water.
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Solar energy
It is energy from the sun used to give power or energy to equipment. It is the conversion of sunlight into electricity either directly using photovoltaics (PV), indirectly using concentrated solar power systems to focus a large area of light to beam
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Wind energy
Energy from the harnessing of wind energy using turbines.
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Wave energy
Sun heats the earths surface, the temperature differences create winds and the wind over the ocean create waves.
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Tidal energy
Tides are long periods of waves because of the gravitational force of the sun or moon.
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What is electricity?
It is the loss of electrons by matter.
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How is electricity created?
Electricity is created when a magnet is spinned within a coil of wire. This is also known as a generator.
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What are turbines?
Turbines are big fans that help the generators create electricity.
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Static elecricity
The imbalance of electric charges. They rub against each other.
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Current electricity
It the flow of the electric charge where this charge is carried by moving electrons.
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What is an electrical circuit?
A path which electrons from a voltage or current flow.
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Components of an electrical circuit
Source of energy, conducting wire, resistor and closed switch
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What is a voltmeter?
It measures the ability in change or potential difference (change in energy from one point to another point). It is always connected over.
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What is an ammeter?
It measure the strength of the current in a series.Current strength is (I), symbol is ampere (A).
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Advantages of renewable energy sources
It never runs out, it is clean and results to little or no greenhouse or net carbon emissions, are reliable, very cheap and once they are put in place they stabilize energy prices.
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Disadvantages of renewable energy sources
Reliability of supply, difficult to generate in large quantity, large capital loss and large amounts of land are needed.
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Advantages of non-renewable energy sources
Large amounts of electricity can be produced.
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Disadvantages of non-renewable energy sources
They will out faster because we are using them more than they take to restore, in their process of burning they produce greenhouse gases and pollute the air.
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What is power?
Power is the rate at which work is done.
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Power formula
Power= work/time
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Other cards in this set
Card 2
Front
What is a system?
Back
A system is different parts of an object working together to create a product or achieve a goal.
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