1. Renewable Energy

2. Renewable Energy Definition:
Energy from sources that are constantly being formed
5 Types of Renewable Energy:
Solar energy
Wind power
Biomass
Hydroelectricity
Geothermal energy

3. Solar Energy Definition: Energy from the sun 2 Types of Solar Energy:
Passive Solar Heating
Active Solar Heating

4. Passive Solar Heating Definition:
Uses the sun’s energy to heat something directly
Example:
Passive solar buildings oriented according to the yearly movement of the sun

5. Passive Solar Heated House

6. Passive Solar Heated House Clip

7. Active Solar Heating Definition:
Gathering of solar energy by solar collectors which is used to heat water or a building

8. Active Solar Water Heater

9. Solar Panels
Definition:
Convert the sun’s energy into electricity

10. Photovoltaic Cells (PV)
Definition:
Technical name for "solar cells"
Captures the sun's energy

11. How Photovoltaic Cells Work
1. Sun light is absorbed by phosphorous and boron enriched silicon
2. Electrons are knocked loose from the silicon by the sun light

12. How The Electrons are Used
1. Electrons are captured in a battery in the form of direct current (DC)
2. An inverter converts DC into alternating current (AC) which is the type of electrical current used in our homes

13. How the Sun's Energy is Turned into Electricity

14. How Much Energy 1 Photovoltaic Cell Produces
1 - 2 Watts

15. Pros for Photovoltaic Cells
Gives off no pollution
Able to get electricity in remote locations

16. Cons for Photovoltaic Cells
Produces a very small amount of electrical current
Require extended periods of sunshine to produce electricity
Very expensive to make photovoltaic cells

17. Solar Panels on a Roof

18. Solar Powered Calculator

19. Solar Powered Car

20. How Solar Panels are Made and Net Zero Home Clip

21. Wind Power Definition:
Converting the movement of wind into electric energy

22. How Wind Turbines Work 1) Blades catch wind and spin
2) Generator converts
mechanical energy into
electrical energy
3) Cable carries electricity
to a power line

23. Pros for Wind Power Cost effective Can be built quickly
Take up little space

24. Cons for Wind Power Finding spots windy enough to put them
Transporting electricity from rural areas to urban areas

25. Wind Farm

26. Wind Power Clip

27. Biomass
Definition:
Plant material, manure and any other organic matter that is renewable that can be used as an energy source
Examples:
Wood
Dung
Alcohol (Ethanol)

28. Pros for Biomass Renewable Resource
Burning dung can bring energy to power stations
Ethanol produces less air pollution than fossil fuels

29. Cons for Biomass
Renewable Resources are being used faster than they can be replaced
Methane is released into the air when dung is burned
Fossil fuels are needed to produce Ethanol

30. Corn Ethanol Clip

31. Hydroelectricity
Definition:
Energy is produced by moving water

32. How Hydroelectricity Works
1) Water from river
enters the penstock
and the force of the
water powers the
turbine
2) The turbine
then powers a
generator which
produces electricity
3) Water is released
into a reservoir

33. Pros of Hydroelectricity
Dams are inexpensive to build and operate
Does not cause air pollution
Hydroelectric dams last a very long time

34. Cons of Hydroelectricity
Dams disrupt ecosystems
Floods can occur behind dams
Difficult to find locations that are suitable enough to build a dam

35. Hydroelectricity Clip

36. Geothermal Energy Definition:
Energy obtained from heat in the Earth’s crust

37. How Geothermal Energy Works
1) A pipe is placed
deep in the ground
to reach hot steam
inside the Earth
2) The hot steam rises and
turns turbines which generate
electricity
3) Leftover water is pumped
back into the rock

38. Pros of Geothermal Energy
Does not produce any pollution
Plants do not take up a lot of space

39. Cons of Geothermal Energy
Expensive to build plants
Difficult to find hot spots to get steam from

40. Geothermal Energy Clips