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.
But the most noteworthy were the ones made of stone. The first period of history is known as the Stone Age. This era is broken down into at least two periods: the Paleolithic or Old Stone Age (10,000 to 2.5 million years ago) and Neolithic or New Stone Age (5,000 to 10,000 years ago).The change from Paleolithic to Neolithic is associated with the end of the Ice Age.Many historians claim that there was a Mesolithic era or Middle Stone age around 10,000 to 12,000 years ago marking the transition between the Old Stone Age and the New Stone Age.he change from Paleolithic to Neolithic is associated with the end of the Ice Age. Many historians claim that there was a Mesolithic era or Middle Stone age around 10,000 to 12,000 years ago marking the transition between the Old Stone Age and the New Stone Age.