Essay on Environmental Science Worksheet

775 WordsNov 14, 20114 Pages
University of Phoenix Material Environmental Science Worksheet Answer the following questions in at least 100 words. The answers are found in Ch. 1–4 of the text. 1. Provide a brief summary of the history of the environmental movement? 2. Explain the main point concerning exponential growth and whether it is good or bad. Compare exponential growth to a logistic growth curve and explain how these might apply to human population growth. What promotes exponential growth? What constrains population growth? 3. Compare predictions for human population growth in developed countries versus developing countries. Why is it difficult to predict the growth of Earth’s human population? 4. Explain how principles of system…show more content…
In terms of applying it to population, exponential growth is flawed, because population growth does not depend strictly on birth rate. Mortality rates, life expectancy, disease, natural disasters, and many other variables affect the rate of population growth. While exponential growth is proportionate to one variable alone - birth rate - a logistic growth curve is an S shape curve that resembles exponential growth at some points, but is also governed by other variables, including an upper limit. Applied to population growth, logistical growth factors in variables other than just birth rate, and shows that as the population grows and other factors increase disease, death, etc., the population growth slows, even if the birth rate doesn't. Exponential growth is promoted when the environment can hold and support a growing number of inhabitants, and when health conditions are good, enabling the death rate to be steady and, as a result, population growth can happen in direct proportion to the birth rate. Population growth is constrained by environmental reasons natural disaster, pollution, etc., medical reasons disease, etc., natural death, and ideology or personal reasons birth control, etc. One big reason is that developing countries tend to have much faster population growth than in developed countries. Developing countries have poor access to birth control, often practice religions which prohibit birth control and value large families, and often have a lot of

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