GEOLOGY

Detailed explanation-1: -Coal is a material usually found in sedimentary rock deposits where rock and dead plant and animal matter are piled up in layers. More than 50 percent of a piece of coal’s weight must be from fossilized plants. Oil is originally found as a solid material between layers of sedimentary rock, like shale.

Detailed explanation-2: -Coal is a solid fossil fuel formed over millions of years by decay of land vegetation. When layers are compacted and heated over time, deposits are turned into coal.

Detailed explanation-3: -COAL IS A FOSSIL FUEL As the plants died, they sank to the bottom of the swamps. Over the years, thick layers of plants were covered by dirt and water. They were packed down by the weight. After a long time, the heat and pressure changed the plants into coal.

Detailed explanation-4: -Solid fuels can be categorised into renewable, biomass and fossil fuels, e.g. coal. Renewable solid biomass fuels include firewood, charcoal, dung and agricultural residues.

Detailed explanation-5: -Coal is a solid, black, readily combustible fossil fuel that contains a large amount of carbon-based material-approximately 50% of its weight.