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Tuesday April 23rd 2013
• QU: What sources of nonrenewable energy are you aware of?
• OBJ: Energy History, Fossil Fuel Activity
If 10,000 schools turned off their lights for one minute it could save $81,885.
Thursday April 25th 2013
• QU: What is energy?
Homework due Monday
• OBJ: Energy Notes and Fossil Fuel Efficiency
What is energy?
• Capacity to do work or transfer heat– Work is only done when something is moved
Brief history of Energy Use
• Scavengers/Hunter-Gatherers– Discovery of fire
• Farmers– Domesticated animals– Wind and Water
• Industrial Society– Non renewable resources
300 fold increase in energy needs
Nonrenewable Resources• Natural Resource
• Called fossil fuels– Remains of ancient organisms
• Supply limited
• Retrieving = environmental damage
Energy Use and the Industrial RevolutionMachinery replaced muscle power between 1760 and 1800
Transition from Wood to Coal
1850-90% Wood
-10% Coal
1860-Oil production
1900-20% Wood
-70% Coal
-10% Oil
1950- -38% Coal
-40% Oil
-18% Natural Gas
2011--38% Coal
-25% Natural Gas
-20% Oil
Time line of energy usage
Ancient times 0 2000
Wood Coal Oil
Population size vs Industrialization
Time
Population size
Industrialization
Why do you think the transition was made from wood to coal to oil?
Energy Quality• Measure of energy to do useful work
– High-quality• High temp heat, burning natural gas, coal
– Low quality• Amount of heat stored in the Atlantic Ocean
Energy Efficiency• Measure of how much useful work is
accomplished by an input of energy – In US only 16% of energy is converted into
useful work– 84% is wasted
Why so many different types?• 4 main uses
– Transportation, heating/cooling, electricity, manufacturing
• Suitability depends on– Fuels energy content, cost, availability, safety,
and byproducts of use
What types of energy do we use?• Almost all of our energy used to heat is from the SUN
BUT
• Most Commercial Energy…– Comes from extracting and burning nonrenewable
resources
Energy Use in Today’s Society
Four Major Uses of Energy
1. Residential and CommercialUS-15%; air conditioning, fridge, heating
2. IndustrialUS-25%
3. TransportationUS-25% US uses 10% of
global oil production on cars—rest of
world-7%4. Electricity
US-35%
Energy Use Over Forty Years
1. chart
Friday April 26th 2013
• QU: What do you have left to do on your power point?
**After today you have 4 days left in the lab**
• OBJ: Work on Project
Tuesday April 30th 2013
• QU: Which type of energy was the most efficient? How did you know?
**Turn in Efficiency Lab**
*KEEP your sub work on your desk!*
• OBJ: Over tests, Efficiency, Natural Gas
Fossil Fuel Usage
• Are we using our fossil fuels efficiently?
Why not?• While the use of oil for heat is long-
established, heating by natural gas is a more recent social development.
• Oil is much more stable than natural gas: It does not carry as much of a risk for leakage and explosions.
• BUT oil produces more pollutants.• Cost of Nat. Gas is decreasing but coal is
more cost efficient.
Uses of Natural Gas• Natural gas is used to produce steel, glass,
paper, clothing, brick, electricity etc.– Products that use natural gas as a raw material are:
paints, fertilizer, plastics, antifreeze, dyes, photographic film, medicines, and explosives.
• Slightly more than half of the homes in the US use natural gas as main heating fuel.– Natural gas is also used in homes to fuel stoves,
water heaters, clothes dryers, and other household appliances.
WedNesday May 1st 2013• QU: What are the four major uses of energy in
today's society?
*Take out Natural Gas Work*
**HW due tomorrow**
• OBJ: Nat. Gas, Coal, Petroleum, Uranium
“In a single human cell there are over 100000 coded messages known
as genes”
Energy Use in Today’s Society
Four Major Uses of Energy
1. Residential and CommercialUS-15%; air conditioning, fridge, heating
2. IndustrialUS-25%
3. TransportationUS-25% US uses 10% of
global oil production on cars—rest of
world-7%4. Electricity
US-35%
Thursday May 2nd 2013• QU: Which type of fossil fuel (so far) have you
known the least about?
*Non Renewable Energy Test Tuesday May 7th***Turn in responses to your article to the HW bin**
• OBJ: Turn in HW, 5mins for petrol/uranium, Propane, Practice Problems
Propane in a Nutshell
• Created from natural gas and petroleum
• Colorless and odorless– Again mercaptan is added
Propane in a Nutshell
• 10% of US propane is imported
• 45% of propane extracted from crude oil
• 45% of propane extracted from natural gas– Natural gas is about 5% propane
Propane in a Nutshell
• Propane is a clean-burning fuel– Used in homes, on farms, businesses, industry
• Mostly rural areas
Propane in a Nutshell
• US uses more propane than any other country
• 90% of propane used is produced in the US
Friday May 3rd 2013• QU: What has been the biggest challenge you
have faced with the project (so far)?
*Non Renewable Energy Test Tuesday May 7th*
• OBJ: Work on your project
“In a single human cell there are over 100000 coded messages known
as genes”
Monday May 6th 2013• QU: What types of fossil fuel is propane derived
from?
*Non Renewable Energy Test Tuesday May 7th*
• OBJ: Review for Non Renewable Energy Test
“In a single human cell there are over 100000 coded messages known
as genes”
Tuesday May 7th 2013• QU: How did you study for this test?
*Non Renewable Energy Test Today*
**Turn in your EC Review to HW bin**
• OBJ: Non Renewable Energy Test
“In a single human cell there are over 100000 coded messages known
as genes”
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