Methane. Methane is an odorless, colorless flammable gas. It is used primarily as fuel to make heat and light. It is also used to manufacture organic chemicals. Methane can be formed by the decay of natural materials and is common in landfills, marshes, septic systems and sewers.Methane can form an EXPLOSIVE mixture in air at levels as low as 5 percent.t is also used to manufacture organic chemicals. Methane can be formed by the decay of natural materials and is common in landfills, marshes, septic systems and sewers. Methane can form an EXPLOSIVE mixture in air at levels as low as 5 percent.
â¢ PALEOLITHIC AGE (noun). The noun PALEOLITHIC AGE has 1 sense: 1. second part of the Stone Age beginning about 750,00 to 500,000 years BC and lasting until the end of the last ice age about 8,500 years BC. Familiarity information: PALEOLITHIC AGE used as a noun is very rare.
The Old Stone Age (Paleolithic Era). The first stone tools were used to meet people's three basic needs of food, shelter, and clothing. These were difficult times; there were no stores to buy food, and people had to cooperate in small groups to make clothing and shelter.