1. ENERGY Energy Forms, Conversion, Resources and Conservation

2. ENERGY - the ability to do work Energy is known by the changes it causes

3. WORK - when a force moves an object through a distance Transfer of energy Measured in Joules

4. TYPES OF ENERGY Kinetic Energy - energy of motion – Depends on an objects MASS and SPEED

5. Potential Energy - stored energy due to position or shape –Depends on an objects MASS and POSITION TYPES OF ENERGY

6. Gravitational Potential Energy – energy that depends on HEIGHT, MASS & ACCELERATION due to gravity TYPES OF POTENTIAL ENERGY

7. Elastic Potential Energy - energy that depends on how much an object is STRETCHED or COMPRESSED TYPES OF POTENTIAL ENERGY

8. FORMS OF ENERGY Mechanical – energy of motion & position Thermal – energy of microscopic particles Chemical – energy stored in chemical bonds

9. FORMS OF ENERGY Electrical – energy associated with electric charges Electromagnetic – energy that travels in waves Nuclear – energy stored in atomic nuclei

10. FORMS OF ENERGY Is the energy staying in the same form in each of these pictures?

11. ENERGY CONVERSION - process of converting energy from one form to another Name some energy conversions

12. Is any energy LOST in the conversions?

13. LAW OF CONSERVATION OF ENERGY - states that energy CANNOT be created nor destroyed (can only be converted) BEGINNING E = ENDING E BEGINNING E = ENDING E

14. LAW OF CONSERVATION OF ENERGY Albert Einstein – famous scientist to theorize that energy & mass are equal –He also theorized that energy & mass can be converted into one another E = mc 2 (theory of relativity) E = mc 2 (theory of relativity)

15. TYPES OF ENERGY RESOURCES Nonrenewable – exist in limited quantities & cannot be replaced (except over millions of years) –creates pollution –ie. fossil fuels (oil, natural gas, coal) (oil, natural gas, coal) & uranium & uranium

16. TYPES OF ENERGY RESOURCES Renewable – can be replaced in a short period of time –creates very little/no pollution –ie. hydroelectric, solar, geothermal, biomass, geothermal, biomass, nuclear fusion & wind nuclear fusion & wind

17. RENEWABLE ENERGY RESOURCES Hydroelectric – energy obtained by flowing water –Gravitational PE  Kinetic E –Water turns turbines connected to generators –Pros- low cost & no pollution –Cons - hampers fish spawning, requires lots of land & disrupts animal habitats

19. RENEWABLE ENERGY RESOURCES Solar – sunlight converted into usable energy –Uses panels or photovoltaic (PV) cells –Pros - no pollution –Cons - high cost & climate dependent Geothermal – thermal energy beneath Earth’s surface –Pumps water into ground which turns into steam & drives generators –Pros – no pollution –Cons – not widely available

21. RENEWABLE ENERGY RESOURCES Biomass – energy stored in living things –Burning wood, garbage & crops –Creation of biofuels –Pros – never ending supply –Cons – some pollution Nuclear fusion – fusion of hydrogen atoms –Pros – little waste & no pollution –Cons – technology not advanced enough

23. RENEWABLE ENERGY RESOURCES Wind – horizontal movement of air turns turbines which turns a generator & creates electricity –Pros – no pollution –Cons – need wind, eye sore & requires lots of land

25. ENERGY CONSERVATION – finding ways to use less energy or use energy more efficiently ie. Turn off lights, carpool, energy efficient appliances & light bulbs Can you think of other ways to conserve energy?

26. WORKS CITED users.tpg.com.autiki.oneworld.netwww.naseg.co.uk www.lpea.com espn.go.comwww.hsdejong.nltechalive.mtu.eduwww.phschool.com www.flickr.com www.helixcharter.net www.maltaconference.com ffden-2.phys.uaf.eduwww.danishexporters.dk www.efluids.com www.edha.co.uk www.free-graphics.com