Conservation of Natural Resources
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| acid rain | precipitation, as rain, snow, or sleet, containing relatively high concentrations of acid-forming chemicals, as the pollutants from coal smoke, chemical manufacturing, and smelting, that have been released into the atmosphere and combined with water vapor
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| conservation | using natural resources in ways that restore them, prevent their waste, and preserve the natural balance of organisms
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| contour plowing | grooves are made across slopes along their curves
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| erosion | the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc
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| fallow | plowed and left unseeded for a season or more
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| fertilizer | any substance used to enrich the soil
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| global warming | an increase in the earth's average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect.
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| greenhouse effect | an atmospheric heating phenomenon, caused by short-wave solar radiation being readily transmitted inward through the earth's atmosphere but longer-wavelength heat radiation less readily transmitted outward
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| natural balance | population equilibrium among organisms and their environments resulting from continuous interaction and interdependency.
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| natural resources | the natural wealth of a country, consisting of land, forests, mineral deposits, water, etc.
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| nitrogen cycle | the continuous flow of nitrogen through the biosphere by the processes of nitrogen fixation, ammonification (decay), nitrification, and denitrification. Nitrogen is vital to all living matter, both plant and animal; it is an essential constituent of amino
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| nitrogen fixation | process as performed by certain bacteria found in the nodules of leguminous plants, which make the resulting nitrogenous compounds available to their host plants
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| nonrenewable resources | cannot be replaced
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| ozone | In the upper atmosphere, it absorbs ultraviolet rays, thereby preventing them from reaching the surface of the earth.
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| pollution | the introduction of harmful substances or products into the environment
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| recycle | to treat or process (used or waste materials) so as to make suitable for reuse
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| renewable resources | can be replaced
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| rotation of crops | the system of varying successive crops in a definite order on the same ground, esp. to avoid depleting the soil and to control weeds, diseases, and pests
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| smog | smoke or other atmospheric pollutants combined with fog in an unhealthy or irritating mixture
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| strip cropping | the growing of different crops on alternate strips of ground that usually follow the contour of the land, a recourse to minimize erosion
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| terraces | a nearly level strip of land with a more or less abrupt descent along the margin of the sea, a lake, or a river
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| topsoil | the fertile, upper part of the soil
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| water cycle | the movement of water through the ecosystem
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| windbreaks | a growth of trees, a structure of boards, or the like, serving as a shelter from the wind
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