Module 5, Unit 4 - Part 2

Module 5, Unit 4 - Part 2 - 1.Life on Earth is based on...

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life on Earth? - Carbon 2.Where on Earth does carbon cycle? On what time scale(s)? - Carbon cycles through the oceans and the biosphere over both short and long term scales. 3.The geological carbon cycle takes how long? In this cycle, carbon cycles through what? - The geological carbon cycle takes place over hundreds of millions of years and involves the cycling of carbon through the various layers of the Earth. 4.The biological carbon cycle takes how long? The biological carbon cycle involves what three processes? - The biological carbon cycle occurs over days, weeks, months and years and involves the absorption, conversion and respiration of carbon by living organisms. 5.Weathering combines carbonic acid (CO 2 plus water) with calcium and magnesium and the product is what? Is this product soluble in water? Review soluble and insoluble if forget what these terms mean. - The product is insoluble carbonates. No it is not soluble in water. 6.Erosion sends this product where? - Erosion sends the product into the ocean and they eventually settle to the bottom. 7.Then, what happens to this product, by the process of subduction? Define subduction. - The product is drawn into Earth’s Mantle by subduction which is defined as a process in which one lithospheric plate descends beneath another, often as a result of folding or faulting. 8.Carbon’s geological cycle is completed when it returns to the atmosphere. In its geological cycle, how does carbon return to the atmosphere? What form is carbon in, when it returns to the atmosphere? Give the phase and the chemical formula of this compound. - Carbon is returned to the atmosphere during volcanic eruptions in the form of carbon dioxide. This phase is called volcanism and the chemical formula is CO2. 9.What three processes control the balance of atmospheric carbon dioxide concentrations over time periods of hundreds of millions of years? - Weathering, subduction and volcanism.
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Module 5, Unit 4 - Part 2 - 1.Life on Earth is based on...

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