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7.2 Nonrenewable Energy

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Samantha Dieck

on 4 May 2014

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Transcript of 7.2 Nonrenewable Energy

Chapter 7 Section 2
Nonrenewable Energy

design by Dóri Sirály for Prezi
Fossil Fuels
A
fossil fuel
is a nonrenewable resource formed from the remains of ancient organisms.
EX: coal, petroleum, natural gas
Consists of
hydrocarbons
.
When burned, they release heat and light.
Formation of Coal
Coal
is the most commonly burned fossil fuel.

Coal deposits are the remains of plants that carried out
carbonization
.
Decaying plants become peat.
Oxygen cannot be present.
Formation of Petroleum and Natural Gas
Petroleum and natural gas are mixtures of hydrocarbons.

Formed from the collection of prehistoric organisms on ocean and lake bottoms.
Heat and pressure over time
changes the composition of
the remains.
Fossil Fuel Supplies
Crude Oil
- unrefined petroleum used for making plastics, medicines, detergents, fertilizer, and many other products.

Coal is the most abundant fossil fuel.

Scientists believe that most of the oil deposits have been found.
But believe there are undiscovered natural
gas reserves.

Oil Shale
- a relatively abundant material that
contains petroleum; cannot be mined easily.
Nuclear Energy
Nuclear Energy
- energy that is produced using nuclear reactor technology.
Nonrenewable Resource
- a resource that is consumed much faster than it is formed.

Types of Coal Deposits
Four stages of coal:
Peat
Lignite
Bituminous Coal (most abundant)
Anthracite (hardest form)
Petroleum and Natural Gas Deposits
Deposits are valuable and highly searched for.
Used for transportation, agriculture, etc.

Mostly mined in
permeable
rock.
Liquids able to move through the pore spaces in the rock.
Fluid flows upward until cap rock is reached (
impermeable
).
Nuclear Fission
The process by which the nucleus of a heavy atom splits into two or more fragments, releasing energy and neutrons.
How Fission
Generates Electricity
Nuclear Reactor
- specialized equipment that controls nuclear fission.

Huge amounts of heat is generated, which is used to generate electricity.

Uses rare Uranium-235.
Fuel rods composed of U-235 enriched-pellets.

Water is pumped around the rods to collect and transport heat.
Advantages Disadvantages
Burns no fossil fuels.
No air pollution.
Must be safely stored.
Radioactivity hazards.
Nuclear Fusion
The nuclei of small atoms (H) combine to form a new, more massive nucleus (He).
Releases energy

More research is needed to build.

Waste is predicted to be much less dangerous than that of nuclear fission.
Full transcript