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CRITICAL THINKING ACTIVITY: THE METHANE CYCLE

Student Sheet 1. CRITICAL THINKING ACTIVITY: THE METHANE CYCLE . WHAT IS METHANE ? METHANE is a chemical compound with the molecular formula CH4. It is the main component in natural gas. METHANE is considered the simplest of alkanes, compounds that consist only of hydrogen (H) and carbon (C) elements. METHANE is an odorless, colorless, tasteless gas that is lighter than air. When METHANE burns in the air it has a blue flame. In sufficient amounts of oxygen, METHANE burns to give off carbon dioxide (CO2) and water (H2O).

THE METHANE CYCLE This diagram of the methane cycle illustrates the flow of methane from sources into the atmosphere, as well as the sinks that consume methane Most people have heard of the water cycle, in which water evaporates into the air, returns to Earth and then evaporates again. Many other substances, including methane, cycle this way too.

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gml.noaa.gov

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