1St Set

Front 1

Biogeochemical cycle

Back 1

is a pathway by which a chemical substance moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth.

Front 2

Respiration

Back 2

a process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances

Front 3

Ground Water

Back 3

is the waterpresent beneath Earth's surface in soil pore spaces and in the fractures of rock formations. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water.

Front 4

Combustion

Back 4

rapid chemical combination of a substance with oxygen, involving the production of heat and light.

Front 5

Erosion

Back 5

the process of eroding or being eroded by wind, water, or other natural agents

Front 6

Transpiration

Back 6

is the process where plants absorb water through the roots and then give off water vapor through pores in their leaves. An example of transpiration is when a plant absorbs water in its roots.

Front 7

Precipitation

Back 7

rain, snow, sleet, or hail that falls to the ground.

Front 8

Assimilation

Back 8

The absorption of nutrients into the body after digestion in the intestine and its transformation in biological tissues and fluids

Front 9

Runoff

Back 9

the draining away of water (or substances carried in it) from the surface of an area of land, a building or structure, etc.

Front 10

Ammonification

Back 10

decomposition with production of ammonia or ammonium compounds especially by the action of bacteria on nitrogenous organic matter.

Front 11

Evaporation

Back 11

the process of a liquid changing into a gas. An example of evaporation is water turning into steam.

Front 12

Nitrification

Back 12

Nitrification is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. The transformation of ammonia to nitrite is usually the rate limiting step of nitrification.Nitrification is an important step in the nitrogen cycle in soil.

Front 13

Percolation

Back 13

is the process of a liquid slowly passing through a filter

Front 14

Denitrifaction

Back 14

the loss or removal of nitrogen or nitrogen compounds; specifically : reduction of nitrates or nitrites commonly by bacteria (as in soil) that usually results in the escape of nitrogen into the air.

Front 15

Nitrogen Fixation

Back 15

the chemical processes by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle.