Time for an energy boost! Please get out objectives #16 and 17 for a stamp. Also, please have your ANWR summary out for a stamp. RTB!

Quiz reflection/objective check

#7 Nonrenewable – longer than a human lifetime to form. Fossil Fuels are nonrenewable because they take millions of years to form. (If we use trees faster than they are growing, they are still a renewable resource)

#8 Because fossil fuels contain hydrocarbons with lots of bonds NUMBER OF BONDS (not the length or the strength of bonds)

#9 US natural gas production peaked in 1973 until fracking really started in 2005. US production has increased 10 times DOE – unproven resources of shale gas = about 500 trillion cubic feet

Check your ANWR summary Compare with your neighbor and highlight similar concepts. Make sure you have the big ideas: Where Issue being debated Parties/groups involved

ANWR: Arctic National Wildlife Refuge – 5 min summary!

National Petroleum Reserve in Alaska  Technically recoverable, undiscovered oil - 9.3 billion barrels. An estimated 1.3 to 5.6 billion barrels of those technically recoverable oil resources is economically recoverable at market prices of $22 to $30 per barrel. Technically recoverable, natural gas for the same area - 59.7 trillion cubic feet. - USGS, 2002

Rank the arguments For your given position, Write one argument to support your side on each board. Put them in order from strongest argument to weakest. Be ready to defend your choices.

Add to your summary (and label it objective #24)

A proposition: We NEED energy. The FORM of energy and the FUELS we use to create convenient energy are a matter of choice.

Evaluating energy sources should include net energy Net energy is the energy provided by the resource (fuel) minus the energy required to produce the fuel.

The limitations (or opportunities) of physics Potential Energy Position Chemical bonds Kinetic Energy Heat (molecules) Light (photons) Motion/mechanical Electrical (electrons) Thermodynamics #1 – energy is neither created or destroyed, it just changes form. Thermodynamics #2 – every time energy changes form, some is lost to the surrounding environment; energy generally becomes less organized as it changes form.

How many energy conversions to create natural gas?

Unconventional fuels have lower net energy (tar sands and oil shales)

Tar sands contain bitumen

Tar sands extraction Mining Steam injection Refining Requires significantly more energy than petroleum extraction

A proposition: We NEED energy. The FORM of energy and the FUELS we use to create convenient energy are a matter of choice.