Energy Resources Flashcards
What type of energy do fossil fuels store?
chemical energy
What type of energy do biofuels store?
chemical energy
What are different energy resources that obtain useful energy or generate electrical power?
fossil fuels
biofuels
hydroelectric dams
geothermal resources
nuclear fuel
solar cells
solar panels
Are fossil fuels renewable?
no
Are biofuels renewable?
yes
Is hydropower renewable?
yes
Are geothermal resources renewable?
yes
Are solar cells renewable?
yes
Are solar panels renewable?
yes
What do solar cells do?
use light from the sun to generate electrical power
What do solar panels do?
uses infrared/other electromagnetic waves from sun to heat water
also is source of wind energy
Are fossil fuels reliable?
yes
Are biofuels reliable?
yes, in theory
Are hydroelectric dams reliable?
yes
Are geothermal resources reliable?
yes
Is nuclear power renewable?
yes
Are solar cells/panels reliable?
yes
Which energy resources are worst for the planet?
fossil fuels
nuclear (produces radioactive waste)
biofuels (produces less, but still some co2)
hydroelectric system (construction releases co2)
Which energy resources are hardest to implement?
solar cells (expensive and places further North or South receive less sunlight)
geothermal (only harnessed in certain locations)
nuclear (expensive to build)
What is efficiency of energy transfer?
how much energy transferred is actually used and not lost
Except for geothermal, nuclear and tidal, what is the main source of energy for all our energy resources?
the radiation from the sun
The sun’s radiation is the main source of energy for all our energy resources except…
geothermal, nuclear and tidal
Through which process is energy released from the sun?
nuclear fusion
What is efficiency in terms of energy?
% efficiency = (useful energy output/total energy output) x 100
What is efficiency in terms of power?
% efficiency = (useful power output/total power output) x 100
