3.3 Energy Resources - PowerPoint PPT Presentation

Loading...

PPT – 3.3 Energy Resources PowerPoint presentation | free to download - id: 71f7f0-OTI0M



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

3.3 Energy Resources

Description:

Human Population, Carrying Capacity, and Resource Use 3.3 Energy Resources Assessment Statements 3.3.1 Outline the range of energy resources available to society. 3.3 ... – PowerPoint PPT presentation

Number of Views:7
Avg rating:3.0/5.0
Slides: 25
Provided by: til96
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: 3.3 Energy Resources


1
Human Population, Carrying Capacity, and Resource
Use
  • 3.3 Energy Resources

2
Assessment Statements
  • 3.3.1 Outline the range of energy resources
    available to society.
  • 3.3.2 Evaluate the advantages and disadvantages
    of two contrasting energy sources.
  • 3.3.3 Discuss the factors that affect the choice
    of energy sources adopted by different societies.

3
3.3.1 Outline the range of energy resources
available to society.
  • Energy can be generated from both renewable and
    non-renewable resources.
  • Renewable resources are sustainable, because
    there is no depletion of natural capital. These
    include
  • Wind
  • Solar
  • Hydroelectric
  • Geothermal
  • Biomass
  • Tidal Schemes
  • Wastes

4
3.3.1 Outline the range of energy resources
available to society.
  • Non-renewable resources are not sustainable,
    because there is a depletion of natural capital.
    These include
  • Oil
  • Coal
  • Natural Gas
  • Nuclear

5
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Fossil Fuels (Oil, Coal, Natural Gas)
  • Advantages
  • Relatively cheap and plentiful
  • Technology for their use, safe extraction, and
    controlling the pollution released by them
    exists.
  • No other energy source is close to replacing the
    amount of energy generated by them
  • Oil can travel via pipeline.

6
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Fossil Fuels (Oil, Coal, Natural Gas)
  • Disadvantages
  • Most important contributor to global warming
  • Implies liquidation of a limited stock of a
    resource
  • Will become increasingly difficult and dangerous
    to extract
  • Oil spills are very damaging and expensive to
    clean up
  • Open-cast mining clears habitat causing
    environmental damage
  • Coal is not easily transportable over long
    distances.

7
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Nuclear Power
  • Advantages
  • Does not emit CO2, so does not contribute to
    climate change.
  • Technology is readily available.
  • Large amount of energy is generated.
  • Very efficient 1 kg of Uranium contains 20000
    times more energy than 1 kg of coal.

8
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Nuclear Power
  • Disadvantages
  • Produces radioactive waste which can be dangerous
    for tens of thousands of years.
  • Never completely reliable, and could be terrorist
    targets.
  • Uranium is scarce, supply will last another 30-60
    years.
  • Time frame to build a plant is 20-30 years.

9
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Hydroelectric
  • Advantages
  • Reliable form of energy generation
  • Dams create large artificial lakes which can be
    used for leisure and irrigation purposes
  • Relatively cheap to run

10
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Hydroelectric
  • Disadvantages
  • Vast areas may be flooded causing loss of
    habitats, farming, and displacement of people.
  • Dams may restrict the flow of sediments affecting
    ecosystems and farms downstream.
  • May lead to increased erosion rates
  • Cost of building a dam is high.
  • Dams may eventually silt-up and be useless.

11
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Tidal Power
  • Advantages
  • Reliability More predictable than solar or wind
  • Low maintenance cost
  • Efficiency Up to 80 efficient at tide to
    electric power
  • Barrages and small dams for it can protect
    coastal cities from dangerous tides.

12
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Tidal Power
  • Disadvantages
  • Good tidal range required to generate sufficient
    energy
  • Right shape of coastline to channel water through
    turbines
  • Expensive to set up
  • Can interfere with navigation
  • Can impact wildlife

13
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Solar Energy
  • Advantages
  • Passive solar energy (plus insulation) is much
    cheaper for heating homes than fossil fuels
  • Low maintenance cost
  • Solar cells can last a lifetime
  • Creates no pollution

14
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Solar Energy
  • Disadvantages
  • Very expensive for generating electricity
  • Limited in northern countries during winter
    months
  • Photovoltaic cells take up a lot of space to meet
    energy needs

15
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Wind Power
  • Advantages
  • Although tall, they only take a small plot of
    land
  • Useful for getting electricity in remote areas
  • Come in a wide range of sizes
  • Doesnt produce pollutants

16
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Wind Power
  • Disadvantages
  • Not reliable as the strength of the wind varies
  • Very noisy
  • Pollution created in their production
  • Requires a lot of turbines to generate large
    amounts of electricity

17
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Biomass/Biofuel
  • Advantages
  • May be less expensive than fossil fuels
  • Can come from a wide range of resources
  • Can be produced locally thereby increasing jobs
    in the area

18
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Biofuel/Biomass
  • Disadvantages
  • Produce emissions when burned
  • Require large amounts of land to grow
  • Land use may push out food crops or natural
    ecosystem

19
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Wastes
  • Advantages
  • Readily available
  • Does not deplete natural capital
  • Gives useful purpose to waste that would have to
    be disposed of in some other way.

20
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Wastes
  • Disadvantages
  • Burning produces emissions
  • Facilities are expensive to construct
  • Technology is very new

21
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Geothermal
  • Advantages
  • 3 to 5 times more effective than electrical
    heating systems
  • Few moving parts which make them very reliable
  • Various arrangements allow for flexibility in
    installation

22
3.3.2 Evaluate the advantages and disadvantages
of two contrasting energy sources.
  • Geothermal
  • Disadvantages
  • Installation is expensive
  • Installation causes a fair amount of disturbance
    to the local area
  • Pump requires electricity to run which normally
    comes from fossil fuels

23
3.3.3 Discuss the factors that affect the choice
of energy sources adopted by different societies.
  • Historical basis due to large oil, coal, and gas
    reserves in certain countries.
  • Oil is high in MEDC due to cars.
  • Biomass is high in LEDC due to use for cooking.
  • Fossil fuels are more prevalent due to lack of
    trust of nuclear power, cheaper, and lack of
    technology for renewable sources.

24
3.3.3 Discuss the factors that affect the choice
of energy sources adopted by different societies.
  • Culture and tradition in MEDCs favor
    non-renewables.
  • Renewables limited by available sites and local
    political issues.
  • Changing awareness of implications of fossil
    fuels and decreasing ease of access has led to
    shift in attitude towards renewable resources
    with an increased demand for them.
About PowerShow.com