Transcript Non Renewable Energy

Energy
An important natural resource
(chapter 27)
We already know…
 Canada’s natural resources (fish, agriculture,
mining, forestry) provide products and jobs
 Some of these resources are renewable, some
are non-renewable
 We must be careful how we use our
resources today, so that they are still
available for use tomorrow
You may not know…
 Canada has a number of valuable energy
resources
 Canadians are the largest users of energy in
the world (per capita)
 98% of our energy use comes from nonrenewable sources (fossil fuels)
oil 39%
natural gas 35%
electricity 24%
Coal
 Coal formed from trees and plants that grew in
swampy areas 350 MYA
 The plants never decayed; got trapped and
compressed by layers of heavy rock
 The compressed material formed coal
 Coal is burned for heat & fuel, and is used to
produce metal
Coal mines in Canada
Oil & Gas
 Usually found together
 Formed from marine animals & plants over
300 MYA when Canada was covered with
water
 Compressed by layers of heavy rock, the
decaying plants & animals were exposed to
bacteria, heat, & pressure
 Oil & Gas deposits are trapped in porous rock
(rock with small holes/pockets)
Why do the gas & oil rise
above the water?
Oil & Gas around the globe
Electricity
Water or
steam
turns
turbines
Generator
produces
electricity
Turbines
supply
energy to
generator
Electricity
travels to
where it’s
needed, via
transmission
lines (wires)
How does this process
start?
 Hydro electricity – water moves from higher
to lower elevation
 Thermo electricity – steam is produced by
burning fuel such as coal, oil, natural gas,
wood, or garbage
 Nuclear electricity – steam is produced from
the breakdown of radioactive uranium
atoms
Let’s Review
Canada has valuable energy resources:




Coal
Oil
Natural Gas
Electricity
The BIG question…
What happens when all
of these non-renewable
energy sources
run out?