Gas is an air-like substance. There are many different types of gas. Some have different smells but most are invisible. Gases can be found in the atmosphere or trapped underground.
Gas is used for cooking on BBQs and stoves.
Helium gas is used to fill balloons to make them float.
Some buses use gas as fuel. Gas is cleaner than petrol.
Gas is used for heaters.
Gas is sprayed on fruit to help it ripen and stay fresh.
Gas is used to make some plastics, such as shampoo bottles.