Warm Up  You are in charge of a multi-million dollar research company. Your company researches new methods of creating energy and ways to improve existing ways of creating energy. What type of energy would you focus most of your money on and why?

Nuclear Fusion  Combining 2 atoms  Some mass changed into energy  Much more energy than fission  Requirements  High speed collisions  High temperatures  Occurs naturally  Sun/stars  Limits to use  High temperatures  No container  Requires lots of energy  Enormous potential Enormous potential

Nuclear Fission  1 atom to 2  Chain reaction Chain reaction  Where?  Reactors  Power plants  Subs  Aircraft carriers  Generates electricity  Creates nuclear waste  European model European model

Nuclear Power Plant  Reactor  Containment dome  Fuel rods  Control rods  Produces heat  Moderator  Heats other water  Creates steam  Turns a turbine  Powers a generator  Creates electricity  Water cooled and reused  Spent fuel  Radioactive  Storage issues

Nuclear Fission Advantages (Pros) Disadvantages (Cons)  EES – 2 EES – 2  EES – 3 EES – 3  EES – 4 EES – 4  EES – 5 EES – 5  EES – 8 EES – 8

Daily Review #4 15. Describe how electricity is made in a nuclear power plant. 16. How are fission and fusion similar? Different? 17. In your opinion, what is the most important advantage of nuclear fission and why? 18. In your opinion, what is the most important disadvantage of nuclear fission and why?

Solar  Where?  Passive  Greenhouses  South-facing windows  Absorbing materials

Photovoltaics Video Movement of electrons Where? – Buildings – Farms Farms – Space Cost

Photovoltaics Advantages (Pros) Disadvantages (Cons)  EES – 2 EES – 2  EES – 3 EES – 3  EES – 4 EES – 4  EES – 5 EES – 5  EES – 8 EES – 8