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DSST Env.Sci. Chp. 9
vocab. for DSST Env.Sci. from Environmental Science by Karen Arms
| Question | Answer |
|---|---|
| amaranth | plant that can survive with little water, producing a grainlike fruit rich in protein |
| aquaculture | cultivation of fish for human use or consumption |
| arable land | fertile land that can be plowed to grow crops |
| biological pest control | pest control using living organisms or naturally produced chemicals |
| carbohydrate | organic compound, such as starch or sugar, made of carbon, hydrogen, and oxygen in which the ratio of hydrogen to oxygen is 2:1 |
| contour plowing | plowing across the slope of a hill to prevent soil from being washed away |
| drought | period when rainfall is less than average, causing crop failure |
| erosion | the wearing away of topsoil by wind or water |
| famine | widespread food shortage |
| fertile soil | soil that can support the rapid growth of healthy plants |
| genetic engineering | scientific activity that develops desirable characteristics in an organism by altering its genes or inserting new genes in the organisms cells |
| green revolution | the introduction of new farming techniques and new varieties of crops, especially grains, in Asia and Latin America |
| lipid | organic compound that contains fats and other substances that living organisms use to get energy |
| low-input farming | farming that does not use a lot of energy, pesticides, fertilizer, and water |
| malaria | infectious disease carried by mosquitoes |
| malnutrition | poor health condition caused by not consuming enough necessary nutrients |
| no-till farming | procedure in which the seeds of the next crop are planted in slits cut into the soil through the remains of the previous crop |
| organic farming | method of growing plants without synthetic pesticides or fertilizers |
| pest | any organism that is not wanted or that exists in large enough numbers to cause damage |
| pesticides | substances that kill pests |
| pheromone | chemical substance secreted externally by certain animals that conveys information to and produces certain responses in other animals of the same species |
| protein | group of organic compounds used for food by living organisms and contained in meats and dairy products |
| resistance | the ability of a pest population to tolerate a particular pesticide |
| salinization | the accumulation of salts in the soil |
| subsistence farmers | farmers who grow only enough food to feed their families |
| synthetic fertilizer | fertilizer produced in factories and used in place of manure and plant wastes |
| topsoil | loose surface layer of soil |
| typhus | infectious disease carried by lice |
| yield | amount of crops produced per unit area |
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