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The 15th Chapter of SCIENCE SAGA (environmental science)

All the information in this Prezi has to do with chapter 15 in the environmental science text book.

Sammy Powell

on 18 May 2011

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Transcript of The 15th Chapter of SCIENCE SAGA (environmental science)

Vocab - Section 1 widespread starvation caused by a shortage of food. a condition that occurs when people do not consume enough calories or do not eat a sufficient variety of foods to fulfill all of the body's needs. Diet - Yield - Famine - Malnutrition - the type and amount of food that he or she eats. the amount of food that can be produced in a given area. Vocab - Section 2 Arable land - land that can be used to grow crops. Topsoil - the surface layer of soil. Erosion - the movement of rock and soil by wind or water. Desertification - the process by which land and arid or semiarid areas becomes more desertlike. Compost - partly decomposed organic material. Salinization - the accumulation of salts in the soil. Pesticides - chemicals used to kill insects, weeds, and other crop pests. Biological Pest Control - the use of living organisms to control pests. Genetic engineering - the technology in which genetic material in a living cell is modified for medical or industrial use. Vocab - Section 3 Domesticated - animals that are bred and managed for human use. Overharvesting - catching or removing from a population more organisms than the population can replace. Aquaculture - the raising of aquatic organisms for human use or consumption. Livestock - domesticated animals that are raised to be used on a farm or ranch or to be sold for profit. Ruminants - cud-chewing mammals that have three - or four - chambered stomachs such as cattle, sheep, and goats. Section 1 Rice Potatoes Foods high in carbohydrates. People eat large portions of food that are high in carbohydrates. A healthy diet is what gives people the energy they need to live by keeping a balance of the right nutrients, minerals, and vitamins. Bread The foods produced in the greatest amounts are different types of grains. Section 2 Feeding The World Crops and Soil The remaining arable land should be used as efficeiently as possible. About half of the original topsoil has been lost due to the effects of erosion. Jillian Buche &
Sammy Powell
Present. . . Environmental Prezi The human body needs atleast eight types of amino acids that can be found in different proteins. When there is only a limited amount of food there is a limited amount of essential proteins. Malnutrition is a major problem in some parts of the world. There are parts of the world that only have the option of corn and rice. Each of these provide proteins, but not enough and not all types. Erosion will wash away soil into nearby rivers or blow them away in clouds of dust. Most of the land on the earth's crust cannot be farmed on. Only 10% of the earth's land is arable land. Urban area's occupy about 3% of the land and this is expanding still. Some expantions have often come onto arable land. Section 3 The total amount of energy that is needed to grow food on farms is less than the amount of energy needed to raise animals for human consumption. About 50% of animal species are domesticated for human use. 23% of the worlds seafood comes from aquaculture. Sea Foods In Other Countries Animals have been the main food source for some populations for centuries. The community of Yorktown relates to Chapter 15 because people who take care of our crops make sure that our crops are not contaminated by pesticides that may harm consumers. A.K.A humans. Oyster farms is one of the many methods of aquaculture. China leads the world in aquaculture.
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