If video does not work try the following link: http ://www.youtube.com/watch?v=n2a4i2pDUCg&feature=related. Energy exists freely in nature. Environment Matters. Sources can be renewable or non-renewable.
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Energy exists freely in nature.
Sources can be renewable or non-renewable.
Some of them exist infinitely (never run out, called RENEWABLE), the rest have finite amounts (they took millions of years to form, and will run out one day, called NON-RENEWABLE).
Renewable resources are natural resources, which are able to quickly replenish themselves and can be used again and again.
● Solar ● Geothermal
● Wind ● Biomass
Water, wind, sun and biomass (vegetation) are all available naturally and were not formed.
Renewable energy can be converted to electricity, which is stored and transported to our homes for use.
What are some examples where you have seen renewable resources being used today?
Solar energy is the sun\'s rays reaching the earth. This energy can be turned into heat and electricity.
How many ways can you think of that the sun\'s energy is used directly today?
Wind is simply air in motion.
The moving air (wind) has huge amounts of kinetic energy, and this can be transferred into electrical energy using wind turbines.
Wind turbines are usually sited on high hills and mountain ridges to take advantage of the prevailing winds.
Non-renewable resources are limited because they are an energy resource that is not replaced or is replaced only very slowly by natural processes.
For example: oil will eventually run out one day!
But not all are!
Most non-renewable resources are fossil fuels.
Some examples are:
These won’t exist anymore once we have used them all up!
Fossil fuels are formed from buried remains of plants and animals that lived millions of years ago.
…but the rate of their production is extremely slow, much slower than the rate at which we use them.
Oil, or petroleum, is used to create fuels, such as gasoline, diesel and jet fuel.
It is also used in the manufacturing of plastics and industrial chemicals.
The environmental impacts of mining oil include threats to waterways, plants and wildlife due to oil spills and increased infrastructure in natural areas.
The impacts of oil combustion include air pollution, smog and increased greenhouse gas emissions.
Nuclear power requires uranium.
It does not create air pollution like fossil fuels.
It produces radioactive waste, which must be disposed of and which can cause problems for humans and ecosystems for thousands of years.
Accidents and leaks from nuclear power plants can have catastrophic effects on the entire planet.
Why should we keep using non-renewable sources?
Why should we stop or reduce our usage of non-renewable sources?
What do you think will happen when these non-renewable resources will eventually run out?
What is the difference between renewable and non-renewable resources?
What were some examples of renewable resources?
What were some examples of non-renewable resources?
What are some ways we can start using more renewable energy resources now?
So we need to find more renewable, sustainable ways of generating energy.
It is important because we need to take better care of Earth’s creations as well as survival in the future.
If video doesn’t work, go to the following link to watch: http://www.youtube.com/watch?v=MjCcmSdraRI
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