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19 Cards in this Set
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Select the BEST answer. The increased production in corn over the past 50 years in the U.S. and in other countries is due to __________.
Improved agricultural methods Machinery Ferttilizers and pesticides Genetic engineering All of the above |
All of the above |
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Please refer to the link, Hunger Glossary. The lack of basic food energy (calories) is referred to as
Starvation Chronic hunger Undernourishment Overnutrition Malnutrition |
Undernourishment |
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Please refer to the link, Hunger Glossary. A person who consumes a diet consisting primarily of grains (carbohydrates) consumes an adequate number of calories for survival but may lack essential vitamins, minerals, and protein. This person would be: Malnourished Undernourished Over nourished |
Malnourished |
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The Green Revolution was ______________. the introduction into agriculture of high-yield hybrid plants and animals. of no benefit to food production in less-developed countries. not successful at increasing agricultural productivity. a military overthrowing of Central American dictatorship regimes. confined only to agricultural crops in the United States. |
the introduction into agriculture of high-yield hybrid plants and animals. |
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The process of accumulating higher and higher amounts of a toxic material such as DDT within the body tissues of an individual organism is called: Biological magnification Bioaccumulation Biological half-life . Biological persistence Biological amplification |
Bioaccumulation |
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Of the following organisms that might occur in a simple aquatic food chain, which organism would have the highest concentration of DDT if it had spilled into the ecosystem several months before being measured? Zooplankton Fish-eating bird Fish Algae Phytoplankton |
Fish-eating bird |
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What fraction of earth’s human inhabitants live in urban areas?
One tenth Three quarters One fifth Half Nine tenths |
Half |
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The majority of agricultural land is used for __________ both in the U.S. and world-wide. growing wheat growing fruits and vegetables growing rice rangeland or pasture growing corn |
rangeland or pasture |
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In which continent is the Sahara Desert located? South America Africa North America Europe Asia |
Africa |
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Select the BEST answer. Which of the following are HUMAN influences in the Sahel land degradation? Population increase Poverty Over grazing Colonial influences All of the above |
All of the above |
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Green Revolution |
Modern cultivation methods Increased frequency of crop plantingsIncreased use of synthetic fertilizersIncreased use of irrigation Increased use of synthetic pesticides Advanced machinery/fossil fuelsSelective breeding/hybrid high yield animals and plants Biologically engineered organisms/genetically modified organisms Antibiotic and hormone use to stimulate organism growth |
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Pesticide |
the only toxic substances released intentionally into our environment to kill living things. |
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Herbicide |
kill plants |
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Fungicide |
kill fungi |
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Fumigants |
kill various pests |
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Erosion |
the action of surface processes (such as water flow or wind) that remove soil, rock, or dissolved material from one location on the Earth's crust, then transport it away to another location. |
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Sedimentation |
the tendency for particles in suspension to settle out of the fluid in which they are entrained and come to rest against a barrier. This is due to their motion through the fluid in response to the forces acting on them: these forces can be due to gravity, centrifugal acceleration, or electromagnetism. |
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Desertification |
the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture. |
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Salinization |
a build up of salts in soil, eventually to toxic levels for plants. (3,000 - 6,000 ppm salt results in trouble for most cultivated plants.) Salt in soils decreases the osmotic potential of the soil so that plants can't take up water from it. |
