1. Electrical generating plant
EXERCISE:
Where does our power come from?
Local
power
lines
Sub-station
High-
voltage
transmission lines
Electrical generating plant A
EXERCISE for groups of 3-4 students: ask them to brainstorm on how far back they can trace our electrical power, and make notes or sketches on a sheet of paper. May collect paper for extra credit before discussion.
Many students are unlikely to be aware of the contribution from fossil energy.
Diagram: Simplified power system, including coal-bearing strata (UE4E Figure 22.8 crop) and sun-driven photosynthesis (UE4E Figure 22.4 crop).
Rock
cycle
Organisms
Fossil fuels
Coal, petroleum,
Natural gas
(Major source)
Source of
energy?
Hydro
Nuclear
Wind/Solar
Geothermal
etc.
(Minor sources)
(Press et al.)
Power from the past 1