EVERYDAY SCIENCE

Detailed explanation-1: -When fossil fuels are burned, they release nitrogen oxides into the atmosphere, which contribute to the formation of smog and acid rain.

Detailed explanation-2: -Electricity is a secondary energy source The electricity that we use is a secondary energy source because it is produced by converting primary sources of energy such as coal, natural gas, nuclear energy, solar energy, and wind energy, into electrical power.

Detailed explanation-3: -Nuclear binding energy is the energy required to separate an atomic nucleus completely into its constituent protons and neutrons, or, equivalently, the energy that would be liberated by combining individual protons and neutrons into a single nucleus.

Detailed explanation-4: -As the plants and ferns continued to decay in the absence of oxygen they formed coal. The oil and gas we use today was formed by the decay of microscopic plants and animals that lived in the ocean millions of years ago.