Biology

Biology

A natural science concerned with the study of life or living matter in all its forms and phenomena, especially in relation to their origin, growth, reproduction, structure, behaviour and evolution.

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Biology > Ecology

soil

Biology; Ecology

A mixture of humus and particles weathered from rock. A cubic yard of soil will cover 300 square feet of ground to a depth of 1 inch. The major nutrients are nitrogen, phosphorus, ...

rotation

Biology; Ecology

Using the same soil to grow different crops. Interrupts cycles of weeds, diseases, and insects; builds organic matter, improves soil structure. Useful rotations: nutrient-grabbing ...

climate

Biology; Ecology

Average atmospheric conditions over a long time interval. Energy from the sun drives climate, which sets limits on a biome's plant life and therefore on the animals that live ...

biogeochemical cycles

Biology; Ecology

The great loopings and returns of life-giving substances through the environment. The three most important are the gaseous (e.g., the carbon, oxygen, and nitrogen cycles), the ...

earthquake faults

Biology; Ecology

There are several types of earthquake faults including: * normal: the hanging wall (the fault that moves) slides down the foot wall (stationary). * reverse: the hanging wall ...

chlorofluorocarbons (CFCs)

Biology; Ecology

Nonburning chemicals made of carbon, chlorine, and fluorine and used in aerosol sprays, solvents, foams, refrigerants, and packing materials. When released into the air and ...

bush fallow

Biology; Ecology

Secondary tropical or subtropical vegetation planted in forests in order to regenerate the soil between crops. In places like western Sudan, this traditional practice has been ...