Most of the electricity used in the world is generated from _______________ that burn ______________ to heat water and make steam.
List the three forms of fossil fuels and give a brief description of each:
The type of energy that is steam (or hot water that has been converted to steam) and that comes from deep inside the earth is called _____________.
Three ways to generate electricity are:
Hydropower: uses the power of falling ___________________.
Ocean energy: uses the energy of the _______________waves and tides.
Wind power: uses the force of the _______________ to spin turbines.
What are three types of alternative fuel vehicles?
What are some of the benefits of people-powered vehicles?