electricity and resources Flashcards
1
Q
why is the ozone layer important to life on earth and what is the main cause of its depletion
A
it protects from harmful uv radiation. cf’s are chemicals that deplete the ozone layer
2
Q
what is the primary cause of global warming
A
burning fossil fuels releases carbon dioxide into the atmosphere
3
Q
name 5 renewable resources
A
hydroelectric, solar, wind, geothermal m, biomass
4
Q
how does a generator create electricity
A
by spinning a coil of wire inside a magnet
5
Q
what is the most common fuel of electric power plants
A
burning fossil fuels (mainly coal)
6
Q
how does the thickness of a wife affect its resistance
A
the thicker the wire the less resistance so more current can flow
