- The type of coal containing lowest carbon is Lignite.
- When animals that lived in the sea millions of years ago died underwater, their remains were gradually covered by layers of very dirt known as “Silt”.
- Wind has been used as a source of energy for centuries about 3000 BC.
- Windmills were used in Europe more than 700 years ago to grind grains and pump water.
- Hydroelectric systems make use of the energy in running water to create electricity.
- Burning of fossil fuel causes global warming.
- Opposite charges attract each other.
- An object that is negatively charged has gained electron.
- The term “Electricity” in referring to state electricity, means “An imbalance of electrons”.
- Glass rod will become positively charged when rubbed with silk.