73 . The phosphorous cycle is an example of a (n) a . hydrologic cycle . b . sedimentary cycle . c . carbohydrate cycle . d . atmospheric cycle . 74 . The hydrologic cycle refers to …
View Notes - KEY Biology 308 Review for exam 3 from BIOL 308 at George Mason University. I will only post answers where necessary. Question one, for example, you can just look it …
BIOCHEMICAL CYCLES A biochemical cycle is the transport and transformation of chemicals in ecosystems. These are strongly influenced by the unique hydrologic conditions in wetlands. These processes result in changes in the chemical forms of materials and also the movement of materials within wetlands. These, in turn, determine overall wetland productivity.
Learning goals Practice mineral ID and apply it to sedimentary rock ID ID 6 major sedimentary rocks Use ilmenite (a mineral which contains the element titanium), which is mined by DuPont to use as a white pigment, as an example of a mineral resource formed by sedimentary processes. Summarize the processes that act to make clastic sedimentary ...
A nutrient cycle is defined as the cyclic pathway by which nutrients pass-through, in order to be recycled and reutilised. The pathway comprises cells, organisms, community and ecosystem. In the process, nutrients get absorbed, transferred, released and reabsorbed. It is a natural recycling system of mineral nutrients.
These elements are essential for life. It is important to recycle and continuously replenish nutrients into the environment for life to exist.
Soil microbes play an important role in nutrient recycling. They decompose organic matter to release nutrients. They are also important to trap and transform nutrients into the soil, which can be taken up by plant roots. Nutrient cycling rate depends on various biotic, physical and chemical factors.
Sunlight is the ultimate energy source. Nutrient cycling is a cyclic process that encompasses the movement of nutrients from the physical environment to living organisms and back to the environment. Nutrients are present on the earth where they are recycled, transformed into different forms and reutilized.
Carbon is the main constituent of all the living cells. All the organic matter and biomolecules contain carbon. Carbon is present mainly as carbon dioxide and methane in the atmosphere. There is a continuous exchange of carbon between biotic and abiotic components by the process of photosynthesis and respiration.
Atmospheric nitrogen is converted to nitrates directly by lightning and assimilated by plants. Decomposers break down proteins and amino acids of dead and decaying organic matters and waste product. Denitrifying bacteria convert ammonia and nitrates to nitrogen and nitrous oxide by the process of denitrification.
Nitrogen is also an essential component of life. Nitrogen cannot be directly utilised by living organisms and has to be converted to other forms. By the process of nitrogen fixation, nitrogen-fixing bacteria fix atmospheric nitrogen to ammonia and nitrifying bacteria convert ammonia to nitrate.
Stratigraphy. Stratigraphy is the study of rock layering, succession, age, distribution, form, and composition of sedimentary rocks. Sedimentary rocks form as layers of sediment that accumulate one on top of the other. The individual layers of sedimentary rock are referred to as strata or beds (stratum for singular).
The individual layers of sedimentary rock are referred to as strata or beds (stratum for singular). Law of superposition states that younger sedimentary layers are deposited on top of older layers, and, therefore, younger layers are closest to the surface and older layers are buried below the surface.
Cementation can occur in combination with the presence of other minerals, rock fragments, or organic constituents such as fossilized organisms. Lithification occurs when unconsolidated sediments are cohesively bound to form a solid sedimentary rock.
It is thought that the chert is the produced by the decomposition of volcanic ash. Chert occurs in a variety of forms including flint, jasper, and agate. Chert is a very hard rock that generally breaks along conchoidal fractures, this characteristic makes it possible to carve sharp-pointed edges onto the rock.
Mudstone. Mudstone consists of very silt-sized and clay-sized grains ( <0.0625 mm) and are often well consolidated with little pore space. Mudstones do not contain laminations or fissility, but they may contain bedding-plane features such as mud cracks or ripples. Mud cracks are formed by subaerial drying conditions.
Igneous rocks are formed by the cooling of molten . magma or lava near, at, or below the Earth’s surface. Sedimentary rocks are formed by the lithification of inorganic and organic sediments deposited at or near . the Earth’s surface.
Conglomerate. Conglomerates are poorly-sorted composites of a wide range of rounded grain sizes ranging from sand to cobbles (< 0.062 to > 2 mm). Conglomerates usually contain a framework of large grains held together by a matrix of sands, silt, and clay-sized particles.