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”