Renewable Flashcards
Scientists are finding ways to use these resources to
Meet our energy needs
Blank is the type of resource that is constantly being supplied
Renewable resources
Renewable resources are
Solar energy, hydroelectric power, wind power, biomass fuels, geothermal energy, hydrogen power
Earth receives enough solar energy to meet the worlds need for
40 years
The problem about solar energy is
Figuring out how to store and use the energy
How does hydroelectric power work
Water flows and then turns turbines connected to electricity generators.
What is the problem about hydroelectric energy
Dams can have a negative effect on the environment
When is wind really important?
In places where it is difficult to transport fuel
What is the problem about wind power
Few places have steady winds
Biomass fuels are
Made from living things
What is the broken about biomass fuels
Takes time to regrow trees that have been cut down and methane and alcohol is expensive
Geothermal energy is when
Water is heated by magma
Problem for geothermal energy
Deep drilling is expensive. Not many places have magma close enough to earths surface
Good things about hydrogen energy
Burns cleanly, creates no pollution and comes in large supplies
What is the problem about hydrogen power?
It takes more energy to get the hydrogen then it gives off
