Compare and contrast two of the following alternative energy sources: wind energy, solar energy, hydropower (stream), tidal power, biofuel, or geothermal energy. Discuss which energy source would be best suited for your home based on cost and availability.

Describe how a tsunami is generated. Explain how tsunami warning systems are used to help forecast tsunami events. Choose a recent tsunami event and describe the history of its occurrence, as well as its impacts on human beings.

These are discussion questions just one or two paragraphs is enough.