1. Energy: Conservation and Transfer
Explain the environmental implications associated with the various methods of obtaining, managing, and using energy resources.

2. Energy: Conservation and Transfer
8.P.2.1
Explain the environmental consequences of the various methods of obtaining, transforming and distributing energy.
8.P.2.2
Explain the implications of the depletion of renewable and nonrenewable energy resources and the importance of conservation.

3. Forms and Transformations of Energy
What is energy?
The ability to make things move or change

4. Energy Transformations
Energy changes forms all of the time but can never be destroyed.
The amount before and after a transfer or transformation will always be the same
Like in a chemical reaction

5. Energy Transformations
When a lightbulb is lit, the energy released as heat is not useful, often called “lost” energy
It is not lost, just transferred to the air around the bulb
Whenever energy is transformed, some moves into the environment in the form of heat, just feel your cellphone while it is charging!

6. Energy Resources and Their Environmental Impact
Humans use large amounts of energy to power cars, heat homes, and produce electricity
This energy comes from the environment
Surroundings of all living things
Energy and the environment

7. Types of Energy Resources
Nonrenewable Energy Resource
Energy source that is used faster than it can be replaced
Also called Exhaustible Resources
Video
Renewable Energy Resource
Energy source than can be replaced as it is used or cannot be used up
Video (Part 2)

8. Nonrenewable Energy Resources
Most energy in the US comes from Fossil Fuels
An energy resource that formed over millions of years from the decayed remains of ancient plants and animals
A solid example of this is coal
Used to power many power plants for electricity
A liquid example of this is petroleum (oil)
Often turned into propane to heat homes
A gas example of this is natural gas
Usually found with petroleum

9. Nonrenewable Energy Resources
The main advantage of fossil fuels is the large amount of energy they can produce
However, this leads to pollution
The release of unwanted materials into the environment
Extracted
the action of taking out something, especially using effort or force ; examples of resources are coal, oil, and natural gas
Coal mining can damage land and pollute water supplies
Burning coal causes air pollution
Accidents can damage habitats
Fossil Fuels Video
History of…

10. Nonrenewable Energy Resources
Burning fossil fuels releases carbon dioxide into the air
Many scientists believe that the extra CO2 has led to Global Warming.
A trend of rising average temperatures around the world
This term has recently been changed to Climate Change
The broader set of changes that go along with global warming: including changes in weather patterns, oceans, ice, snow, and ecosystems.
Argument about Global Warming
Long
Argument against Global Warming
Shorter

11. Nonrenewable Energy Resources
Ozone
An inorganic molecule with the chemical formula O3. A major air pollutant in the lower atmosphere but a beneficial component of the upper atmosphere
It is a pale blue gas with a distinctively pungent smell.
Los Angeles Smog
Greenhouse Effect
The heating of the atmosphere owing to the presence of CO2 and other gases.
Greenhouse Effect, Ozone, and Global Warming Video

12. Nonrenewable Energy Resources
Nuclear Energy
Energy released during nuclear fission or fusion, especially when used to generate electricity.
Another source of energy used in the US
Most use Uranium, a nonrenewable resource
Does not cause air pollution
Could release radioactive materials into the environment that could be harmful to living organisms (us…)
Produces radioactive waste which needs to be stored for a long time

13. Renewable Energy Resources
Humans have used Natural Resources for thousands of years
Materials provided by the Earth that can be used to make more complex products
Wind
Water
Solar

14. Renewable Energy Resources
Solar Energy
Processes that use energy from the sun to generate heat or electricity.
Often used today to heat water in homes
Solar panels can be used to produce electricity also
Photovoltaic Cell
Another name for a solar cell
They collect sunlight that heats the atoms in the cell
Cannot be used at night
Can combine with Solar Batteries
Store the energy collected during the day
Solar Reflector
Reflects and focuses sunlight onto fluid-filled pipes

15. Renewable Energy Resources
Wind Energy
The kinetic energy of wind, harnessed and redirected to perform a task mechanically or to generate electrical power.
Turns the Wind Turbines
Structure that has large blades attached to an engine and that is used to produce electricity
No pollution but does affect local environments
Noisy for the neighbors
Local birds and bats are often struck by the blades
Many nations looking offshore to build new wind farms

16. Renewable Energy Resources
Description of Wind Turbines
Elizabeth City Wind Farm (Part 1)
Elizabeth City Wind Farm (Part 2)

17. Renewable Energy Resources
Hydroelectric
Generating electricity using flowing water to drive a turbine that powers a generator.
typically from a reservoir held behind a dam
Built on rivers in US and around the world
Moving water turn blades to produce electricity
Similar to wind energy
Usually near waterfalls or fast moving water
Watch This Dam Video!
Dam Removal Video

18. Renewable Energy Resources
Biomass
Any material from living things that can be used as an energy source
Examples include burning wood, fermenting crops like corn for ethanol
Disadvantage is the release of CO2 into the environment
Another disadvantage is the use of food source for energy when there are people starving.
NASCAR connection

19. Renewable Energy Resources
Geothermal Energy
Heat energy inside Earth that can be used to heat buildings and produce electricity
Usually located over volcanic grounds
Iceland has the largest number
Nearly 90% of all homes in Iceland are heated by geothermal energy
Geothermal Heat (1 minute)
Geothermal Use in Iceland (11 minutes)

20. Using and Conserving Energy Resources
Nonrenewable energy resources are used most worldwide.
In the last 50 years, we have doubled the use of fossil fuels to meet the growing world population
These fuels will not last forever

21. Using Energy Using Energy Conserving Energy Using energy responsibly
The more tools and devices we develop, the more energy we will need
Conserving Energy
In the 1950’s we used the same amount of energy we produced
In the 2000’s we use much more energy than we produce
Conservation
The careful use and management of resources
Using energy responsibly
20 Minute Video
Bill Nye Energy Episode
Major League Baseball Goes Green
10 minutes