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Science chap.25
Conservation of Natural Resources
| Question | Answer |
|---|---|
| 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 |
| conservation | using natural resources in ways that restore them, prevent their waste, and preserve the natural balance of organisms |
| contour plowing | grooves are made across slopes along their curves |
| erosion | the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc |
| fallow | plowed and left unseeded for a season or more |
| fertilizer | any substance used to enrich the soil |
| 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. |
| 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 |
| natural balance | population equilibrium among organisms and their environments resulting from continuous interaction and interdependency. |
| natural resources | the natural wealth of a country, consisting of land, forests, mineral deposits, water, etc. |
| 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 |
| 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 |
| nonrenewable resources | cannot be replaced |
| ozone | In the upper atmosphere, it absorbs ultraviolet rays, thereby preventing them from reaching the surface of the earth. |
| pollution | the introduction of harmful substances or products into the environment |
| recycle | to treat or process (used or waste materials) so as to make suitable for reuse |
| renewable resources | can be replaced |
| 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 |
| smog | smoke or other atmospheric pollutants combined with fog in an unhealthy or irritating mixture |
| 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 |
| 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 |
| topsoil | the fertile, upper part of the soil |
| water cycle | the movement of water through the ecosystem |
| windbreaks | a growth of trees, a structure of boards, or the like, serving as a shelter from the wind |
Created by:
daisy37311
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