Search results for:  carbon
 

Number of matches:  6

carbon Nonmetallic element found in all organic compounds.

carbon 14 dating The selection and testing of undisturbed soils, buried materials such as wood, firepit remains, and other organic materials, for measurement of radioactive carbon 14 with a half-life of approximately 5,500 years, to determine the rough age of the selected materials.

carbon assimilation Photosynthesis.

carbon cycle The process of changing atmospheric carbon into sugar by photosynthesis in plants, synthesis of more complex organic compounds in higher plants and animals, and the return to carbon dioxide by respiration or death and decay of plant and animal tissues.

carbonate zone A soil layer with concentrated carbonates, chiefly calcium carbonate, found most often in arid areas.

Carboniferous Refers to the Pennsylvanian (upper carboniferous) and Mississippian (lower carboniferous) geological periods in the upper part of the Paleozoic era, about 200 to 260 million years ago.

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