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Earth's Energy Resources

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by

Leslee Siefert

on 27 July 2016

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Transcript of Earth's Energy Resources

Earth's Energy Resources
Hydro-Electric
Energy from the flow of water
MECHANICAL --> ELECTRICAL

Pro
: water is the best, most powerful, for turning turbines
Con
: the world has run out of good spots to install more
Wind
Energy from the flow of air (wind)
MECHANICAL --> ELECTRICAL

Pro
: very space efficient - one turbine = 600 homes
Con
: noisy, ugly
Solar
energy from the sun's electromagnetic rays
ELECTROMAGNETIC --> ELECTRICAL

Pro
: there is an excessive amount of energy available
Con
: solar panels take a lot of space
Biomass
energy harnessed from burning previously living things or plant/animal by-products
CHEMICAL --> ELECTRICAL

Pro
: reduces need for landfills, especially when burning garbage
Con
: uses resources that have other uses (food, forests, etc.)
Geothermal
energy harnessed from the heat within earth
THERMAL -->ELECTRICAL

Pro
: simple and reliable
Con
: location specific -- best locations are far from civilization
Natural Gas
a mixture of hydrocarbon gasses obtained from underground porous sedimentary rocks
CHEMICAL --> THERMAL
Pro:
Con:
Coal
energy from mineralized, fossilized carbon from ancient forests and wetlands
CHEMICAL --> ELECTRICAL
Pro:
Con:
Nuclear
energy harnessed from the fission (breaking) of atoms within a reactor
NUCLEAR --> ELECTRICAL
Pro:
Con:
Petroleum / Crude Oil
a natural liquid consisting of a mixture of complex hydrocarbons - formed from ancient marine plants and animals.
CHEMICAL --> MECHANICAL
Pro:
Con:
Ocean Waves, Currents & Tides
Harnessing energy from the movement of wind-driven ocean water
MECHANICAL --> ELECTRICAL

Pro
: non-stop energy available
Con
: limited areas where these can be built
energy sources that
can
be naturally re-generated over a
short
period of time, come directly from the
sun
, or from natural
mechanisms
of the environment
Renewable or Inexhaustible Energy
energy sources that
cannot
be naturally re-generated over a short period of time, or have a
limited
supply
Non-Renewable Energy
Practically endless supply of garbage and plant by-products.
Scientists estimate that the sun will burn another 4 billion years.
The water cycle is dependent on the sun and gravity, neither of which will run out of energy any time soon.
Wind is caused by the sun heating Earth's atmosphere, and the spinning of the planet. Neither of these will stop happening any time soon.
Heat within Earth comes from radioactive decay of Earth's core, which won't stop for billions of years.
Ocean waves and currents are primarily caused by wind which will continue to "work" for billions of years.
Petroleum is a fossil fuel -- was created millions of years ago. We are using it faster than it could ever be replenished.
Natural gas is also a fossil fuel.
Coal is also a fossil fuel.
Currently we use Uranium-235 inside nuclear reactors. There is a limited supply of this element -- somewhere between 85 and 1,000 years left.
Full transcript