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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). When it undergoes combustion it produces a great amount of heat, which makes it very useful as a fuel source.

the atmosphere clean of pollutant molecules and break them down. For this reason OH is known as the ‘cleanser of the atmosphere’. After reacting with OH, atmospheric methane is converted to CO 2 by a long series of chemical reactions.) Some of the methane present in the troposphere passes into the stratosphere where the same process

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MODELING EARTH’S ATMOSPHERIC

gml.noaa.gov

Earth's surface. Measure and draw a line 80 mm from the Earth's surface. Label this layer mesosphere. Color it red. Draw pictures to help show characteristics. Draw the ionosphere. This is the fourth layer of the atmosphere. It extends 80km-400km from the surface. Label it the ionosphere and color it pink.

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living organisms, the oceans, the atmosphere, and the ...

gml.noaa.gov

living organisms, the oceans, the atmosphere, and the Earth’s crust in what is known as the carbon cycle. The directions taken by carbon atoms through this cycle are very complicated and can take millions of years to make a full circle.

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PROBLEM SOLVING ACTIVITY: HOW DO EARTH’S SPHERES …

gml.noaa.gov

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gml.noaa.gov

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solar radiation, electromagnetic radiation spectrum. Solar ...

gml.noaa.gov

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CRITICAL THINKING ACTIVITY: THE ELECTROMAGNETIC …

gml.noaa.gov

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gml.noaa.gov

2 Student Sheet 2 Cooling things by conduction works the same way as warming. This time, a hot metal spoon is put in room-temperature water. The faster-moving atoms in the spoon contact the slower-moving molecules in the water. The atoms in the spoon transfer some of their energy to the molecules in the water. The spoon will get

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gml.noaa.gov

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gml.noaa.gov

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gml.noaa.gov

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courses.seas.harvard.edu

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nios.ac.in

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fisicaatmo.at.fcen.uba.ar

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www.dept.aoe.vt.edu

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PROBLEM SOLVING ACTIVITY: HOW DO EARTH’S SPHERES …

gml.noaa.gov

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royalsociety.org

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