Transcript GEO PWP: Resources #2-6

Resource #2: Forests
Natural Resource Mini Unit
Resource #2: Forests
• Forests are renewable resources
• Forests are valuable to hikers, campers,
painters, cross-country skiers, etc.
• Economic Value: supplying building materials,
paper, even food (walnuts, maple syrup) and
medicine (in some tropical trees)
• Three types of forest logging methods...
(on the next three slides)
1. Selective cutting: harvesting only mature trees, no
seedlings required
2. Shelterwood Cutting:clear-cut smaller areas, leaving
small patches untouched so the remaining trees can
regenerate a more natural forest
3. Clear-cutting: cutting all trees in a large area, new
seedlings of a fast-growing tree are planted for
future logging
Forests: Discussion
• Which logging method do you think is the
best? Why?
•Selective Cutting
•Shelterwood Cutting
•Clear-cutting
• Consider our Town Hall. Who would prefer
the above methods and why?
Forests: Video
• http://www.youtube.com/watch?v=MSASCHnt0c&list=PL9DE8CFCB12523A00 (5 mins)
• Can you find the connection to Dana’s
presentation yesterday?
Resource #3: Fish
Natural Resource Mini Unit
Resource #3: Fish
• Who? Fish are a renewable resource
• Where? Most fish are located along the
continental shelf (shallow zone of water along
the edge of continents)
•What’s the problem? Worldwide resource
depletion because of over-fishing, pollution of
fish habitats and commercial fishing in oceans
Fishing Technology
New technologies allow big international fleets to
take enormous hauls. Here is how it is done:
– Electronic sonar and GPS to locate fish
– Ships cross the area, dragging huge nets
(trawling) at the right depth
– Usable catch is often cut, packaged and frozen
right on board “factory ships”
– Ships can remain on ocean for several weeks
before returning home
Problems?
• Huge nets take everything
(including dolphins, sharks,
sea turtles, immature fish, etc.)
• Results in millions of tonnes of waste every
year
• Fish populations can’t renew themselves
because so many young fish are caught
• Nets destroy sea bottom when dragged
Fish: Discussion
• How is the new fishing technology similar to
clear-cutting forests?
Fish: Videos
• https://www.youtube.com/watch?v=6ps0truA
RKs (3min, sustainable fishing)
• http://ocean.si.edu/ocean-videos/reducingbycatch (2min, reducing bycatch)
Resource #4: Minerals
Natural Resources Mini Unit
Can you name
the minerals in
the pictures?
RECAP: Natural Resources
Where we’ve been and where we’re going...
1.Water (renewable and flow)
2. Forests (renewable)
3. Fish (renewable)
4. Minerals (non-renewable)
5.Fossil Fuels (non-renewable)
6. Energy (renewable and flow options)
Minerals
• Fuel Minerals =
fossil fuels (oil, coal,
natural gas, etc.)
• Non-Fuel Minerals =
metallic minerals
(gold, silver, copper,
nickel, zinc, etc.)
Mineral Production / Mining
• Canada is among the leading nations of the
world in mineral production
• Gold Rush
– B.C. 1856
– Yukon 1898
• Igneous Intrusives: magma flows that have
intruded into surrounding rock and often
contain mineral rich veins of gold, silver,
copper and other metals
Mining Minerals: Video
• http://www.youtube.com/watch?v=GHJNnb2
dDsk&list=PL388B991B5A1CA2A9 (Natural
Resources Canada) – mining initiative (8 min)
In the News… (if time)
• Attawapiskat Aboriginal Reserve (at the tip of
James Bay in Ontario)
• Debeers Diamond Mine nearby
• Who are all the perspectives involved?
• http://www.cbc.ca/news/canada/sudbury/sto
ry/2013/02/19/sby-debeers-mine-blockadeattawapiskat-injunction-granted.html
Resource #5
Fossil
Fuels
Oil, Natural
Gas, Coal,
Uranium
Textbook Exploration
• Pg. 162 – 164 (class read aloud while creating
a class note together - include 3 definitions)
• Rest of the textbooks are in Ms. Mullins room
Fossil Fuels: Video
• http://www.history.com/topics/oilindustry/videos#black-gold (black gold - oil, 3
mins)
Finish early? Start into Resource #6 (longer one).
Resource #6: Renewable Energy
Natural Resources Mini Unit
What is Renewable Energy?
• Renewable Resource: a resource that can be
replaced fairly quickly, such as forests and
animals
• Energy (used for work) can be extracted from:
– Non-Renewable Resources: Fuel Minerals / Fossil
Fuels (oil, coal, etc.)
– Renewable/Flow Resources: Wind, Solar,
Hydropower, Geothermal, Biomass
• Renewable Energy: energy that comes from
resources which are continually replenished
Five Types of Renewable Energy
Can you name
the types in the
pictures?
1. Wind
Summarize how
each type works.
Choose three key
points for each.
2. Solar
Summarize how
each type works.
Choose three key
points for each.
3. Hydro
Summarize how
each type works.
Choose three key
points for each.
1. A dam blocks water from moving where it wants to naturally
2. Instead, the water flows through a pipe to a turbine, then back out on the
other side of the dam
3. Turbines spin by force
of water and rotate a
generator
4. Generator produces
electricity and sends
to power lines,
bringing electricity to
homes and businesses
4. Geothermal
1.
2.
3.
4.
Summarize how
each type works.
Choose three key
points for each.
The Earth's hot core creates magma and heats the Earth's crust which is
made up of rocks and water.
A well drilled two miles deep into the Earth's surface captures the rising
hot water and steam.
The hot steam rises to
the surface and pushes
a turbine, which
rotates a generator.
Generator produces
electricity and sends
it to power lines,
which bring electricity
to homes and
businesses.
5. Biomass
1.
2.
3.
4.
•
Summarize how
each type works.
Choose three key
points for each.
Wood scraps, sawdust and crop waste are collected from farms or
manufacturing plants
The waste is burned to heat water and create steam
Steam is sent to a
turbine, which spins to
power a generator
Generator creates
electricity and sends
to transmission lines
Waste produced by
cows or other farm
animals creates a gas
called methane, which
can be captured to
produce electricity.
Renewable Energy: Videos
• Understanding Hybrid Cars
• http://www.youtube.com/watch?v=LV2W36f
PWng (2min)
• National Geographic “Energy Conservation”
• http://video.nationalgeographic.com/video/e
nvironment/energy-environment/energyconservation/ (3min)