Energy Sources Do Now: ●What are all of the possible sources we can get energy from?What are the pros and cons of each? ●What is renewable vs. nonrenewable?

Objectives: ●Distinguish between renewable and nonrenewable resources. ●Explain pros and cons of various energy sources.

What are Resources: ●Renewable resources are resources that can be replaced such as trees, water, etc. ●Nonrenewable resources cannot be replaced such as minerals (coal)

Fossil Fuels - nonrenewable ●Non-renewable - we cannot replace them, when they are gone they are gone forever ●made from organic (living) organism that have changed over time o coal o oil o natural gas

Nonrenewable Information What are they?

Renewable Energy Overview What are they?

Geothermal Energy - renewable ●Heated water from under the earth creates steam ●Pipes take the heated water, steam, to a turbine ●Steam powers the turbine to spin creating energy

Geothermal Energy ~ cost/benefits ●Could supply 10% total needed energy ●Small carbon footprint ●Minimal waste products o some waste can be used such as sulfur o waste water recycled back into earth to be reheated and used for power

Video Geothermal Heating 3:18

Nuclear Energy - renewable ●Nuclear fission is the process where the nucleus (hence 'nuclear' energy) of a 'heavy', fissionable atom is split. Enormous amounts of energy are released in this process. ●This energy, in the form of heat, is transferred to steam turbines to generate electricity.

Nuclear Energy - cost/benefit ●radioactive material can be released if overheat, natural disaster, etc. ●low carbon footprint, very clean energy

Hydropower - renewable ●hydropower accounted for roughly half of the nation’s renewable-generated electricity in 2013hydropower accounted for roughly half of the nation’s renewable-generated electricity in 2013 ●water enters the facility and turns a turbine ●that spins the generator and creates energy ●

Video Hydropower Graphic - How it Works

Solar Energy - renewable ●The curved mirrors are tilted toward the sun, focusing sunlight on tubes that run the length of the mirrors. ●The reflected sunlight heats a fluid flowing through the tubes. ●The hot fluid then is used to boil water in a conventional steam-turbine generator to produce electricity. ●

Video Solar Panels 2:08

Wind Energy - renewable ●The energy in the wind turns two or three propeller-like blades around a rotor. ●The rotor is connected to the main shaft, which spins a generator to create electricity. ●

Video Wind TurbinesWind Turbines 3:17 Slideshow ●Look at how large they really are.Look at how large they really are.

Biofuel Energy - renewable ●may also hear it called biomass energy/fuel ●organic renewable energy source that includes materials such as agriculture and forest residues, energy crops, and algae o composted materials - corn cobs, egg shells, etc. ●still working on making this more efficient

Video Biofuel EnergyBiofuel Energy 2:56