1.Some fossil fuels are coal, crude oil, and natural gas.
2.They were formed millions of years ago.
3.Yes, they do.
4.There are five types of renewable energy sources.They are solar, energy from the Sun; geothermal, energy from heat within the Earth; hydroelectric, energy from moving water; biomass, energy from dead plants and microorganisms and finally, energy from the wind.
5.No, they aren't
6.Because it is a natural energy, always available and does not have to be formed like nonrenewable energy.