17962712
Description
Flashcards by Martha Simpkins, updated more than 1 year ago
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Created by Martha Simpkins
over 5 years ago
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| Question | Answer |
| Energy is a measure of... | ..what an object can do |
| It is measured in.. | ..Joules (J) |
| Energy can be roughly divided into 10 types: | Light , gravitational potential) Thermal (moving heat) Internal (warmth) sound , chemical potential (from chemical reactions) , nuclear potential (from nuclear reactions) elastic potential (from stretching) electrical potential kinetic (moving objects) |
| The law of conservation of Energy is.. | *Energy cannot be made, created or destroyed *Energy can only be transformed from one type to another |
| input energy = | output energy |
| Sometimes numbers are included ; electrical (100J) = light (75J) and thermal .... | ...(25J) |
| Energy is ... | .... a measure of what an object can do |
| Energy is transferred... | ...from one type to another |
| Energy cannot be ... | ...created or destroyed |
| Work done, or work is ... | ... a measure of energy |
| As it is energy, the unit is.. | ...joules (J) |
| Work done calculates ... | ...how much energy is needed to move an object a distance (with a force) |
| work done = E= | force x distance F x d |
| The force is measured in .. | ..newtons (N) |
| ... and the distance in... | metres (m) |
| Force is measured using a ... | ... newtonmetre |
| Distance is measured using a ... | ... ruler |
| Power calculates .. | the rate at which energy is delivered |
| power = P= | energy / time E/t |
| The unit of power is ... | ... watts (W) |
| An energy resource is... | ...something that can produce heat, power life, move objects, or produce electricity |
| Renewable energy is... | ... from an energy resource that will not run out. More of it is continuously made faster than we use it. |
| Non-renewable energy is... | ...from an energy resource that is used faster than more of the energy resource can be formed. One day the resource will run out. |
| Fossil fuels are formed from.... | plants and/or animals |
| ....That have died a long time ago and have been exposed to high.... | heat and pressure |
| ...Under the Earth's crust for... | hundred's of millions of years |
| Two main reasons we are using fossil fuels less are: | -they are non-renewable meaning one day we shall run out of them -they produce carbon dioxide when burnt. This gas contributes to global warming. |
| Coal is a solid fuel it is burnt in power stations converting .......... potential energy into thermal. | .. chemical ... |
| ....This then boils water, which turns to ... | steam |
| ......The steam turns a turbine, which turns a generator, producing ............ energy. | electrical |
| Some advantages of using coal are: (3) | -It is cheaper to build and run (cheap fuel) -Abundant (available when needed) -Can be found almost anywhere |
| Some disadvantages of using coal are: (4) | -Nonrenewable (around 150 years left) -Cost will increase over time -Produces carbon dioxide when burnt -Produces sulphur dioxide which causes acid rain |
| Oil is a liquid fuel. It is burnt in power stations, converting .................. potential energy into thermal energy. | chemical |
| This then boils water, which turns to ........... | steam |
| The steam turns a turbine, which turns a ......................., producing electrical energy. | generator |
| Advantages of using Oil: (4) | -Cheaper to build and run (cheap fuel) -abundant ( available when needed) -can be found almost anywhere -produces less sulphur dioxide |
| Disadvantages of using oil: (3) | -nonrenewable (around 53 years left) -cost will increase over time. -produces greenhouse gases when burnt |
| Natural gas is a .................. | gas fuel |
| It is burnt in power stations, converting chemical potential energy into .................... energy. | thermal |
| This then ................... water, which turns to steam. | boils |
| This steam turns a ............................, which turns a generator, producing electrical energy. | turbine |
| Advantages of using gas: (4) | -Cheaper to build and ran (cheap fuel) -abundant (available when needed) -can be found almost anywhere. -Produces less sulphur dioxide. |
| Disadvantages of using gas: (4) | -Nonrenewable (about 75 years left) -Cost will increase over time -Produces Carbon Dioxide when burnt. -Produces sulphur dioxide which causes acid rain |
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