Identification should include the following sources of energy arranged by their degree of availability:

Limited/Unsustainable (e.g., coal, oil, natural gas, uranium)
Unlimited/Sustainable (e.g., solar, wind, gravitational, tidal, geothermal, fusion)
Renewable (e.g., solar, wind, water, bioenergy, geothermal, wood, biomass gasification, biomass fermentation, animal power, human muscle power)

Process/Skill Questions:

What are two sources of energy for today’s automobiles? What are the advantages and disadvantages of each?
By means of a historical timeline, how would one trace the progression of energy sources used in technological devices since the beginning of technology?
What current and future types of energy sources could be useful in space travel? How might these energy sources be useful?
What are examples of limited sources of energy? What are examples of unlimited sources of energy? What are examples of renewable sources of energy?