Copy of 07 - Nitrogen and Water Cycle - The Carbon Cycle Questions 1 In the diagram add arrow and labels to indicate the following activities(a

Copy of 07 - Nitrogen and Water Cycle - The Carbon...

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The Carbon Cycle Questions 1. In the diagram, add arrow and labels to indicate the following activities (a) Dissolving of limestone by acid rain (b) Drilling for oil reserves (c) Burning of plant materials 2. Describe the biological origin of each of the following geologic deposits (use Google or Wikipedia) (a) Coal: Coal usually forms from buried tissues of higher plants. Most of Earth's coal originated as trees, ferns, and other tropical forest plants that lived in a warmer time in our history. (b) Oil: Oil mostly originated as very simple organisms – such as bacteria, algae and plankton. This organic matter – and often the sandstone or limestone beds that hold the oil – was deposited in marine or lake basins, and in the ocean. (c) Limestone: It is believed that limestone has existed for more than 3 billion years, since the Precambrian times. Shallow seas provided the ideal breeding ground for calcium carbonate, which begins life underwater as a result of an accumulated biological deposit.

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