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Cycling of Matter in the Biosphere

Biology 20, Unit A, Ch. 3 (Nelson)

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Across
1.the trapping of the sun's warmth in a planet's lower atmosphere due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface (two words)
4.______________ cycle is also known as water cycle
10.this cycle consists of a biological and a geochemical cycle
15.the movement of a liquid through a porous material, such as soil particles or ground coffee beans
17.loss of water through plant leaves
19.upward motion of water, as in plant stems and trunks (two words)
23.the ability for a given substance (the solute) to dissolve (in a solvent, such as water)
25.this kind of chemical compound is based on carbon and is fundamental to life on earth
26.material used to restore nutrients to plants
27.this nutrient must be in ionic form in order to be useful to plants, so the gas from the atmosphere must be "fixed"
28.the removal of soluble materials by percolation
Down
2.a supply or source of something
3.CR (two words)
5.the top level of the region below the ground that is saturated with water (two words)
6.carbon of this type is found in three main reservoirs: atmosphere, ocean, and Earth's crust
7.rapid chemical combination of a substance with oxygen, involving the production of heat and light; commonly known as "burning"
8.type of bond that is formed between the + end of one water molecule and the - end of another (two words)
9.a hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from the remains of ancient plants and animals and used as fuel (two words)
10.PS (one word)
11.this cycle is closely linked to the carbon cycle; both of these cycles depend heavily on PS and CR
12.slowly decomposing plant matter produced in low-oxygen environments such as bogs
13.atmospheric phenomenon whereby emissions of S and N compounds are transformed by chemical processes in the atmosphere and then deposited on earth in either wet or dry form (two words)
14.the process in which nitrates are converted to nitrites and then to nitrogen gas
16.a banded limestone structure containing fossilized bacteria
18.this cycle involves atoms of the element cycling between organic and inorganic forms
20.chemical that is essential to living things
21.nitrogen _______________: two processes in which atmospheric or dissolved nitrogen is converted into nitrate ions
22.the extent to which a surface can reflect light
24.water is a __________ molecule, which means that it has a positive and a negative end

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