Study Guide for Unit1

Study Guide for Unit1 - Study Guide for Unit#1 Chapters 1 5...

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Study Guide for Unit #1 Chapters 1 – 5 & 17 Population Trends: 1.) How old is our planet? How long have humans (homo sapiens) existed on earth? Earth is approximately 4.55 billion years old Homo sapiens first appeared nearly 1 billion years ago. 2.) What is the approximate size of the current human population on earth? In 1999, it is 6 billion individuals. 3.) U.N. demographers have noted a decrease in global fertility rates. What are some limiting factors that control the human population today? What are some of the natural limiting factors that have historically controlled the human population? Use of contraceptives, birth control; only three children per family (today). Natural disaster and disease (years ago) 4.) Give some examples of countries that are experiencing zero/negative population growth and some countries that are experiencing positive population growth. Greenland and Russian are experiencing negative human population growth. Mongolia, Brazil, Indonesia, and the U.S. are experiencing positive population growth. 5.) Give several examples of highly developed, moderately developed, and less developed nations. Highly developed countries US, Canada, Japan Moderately developed countries Mexico, Turkey, S.Africa, Thailand Less developed countries Bangladesh, Mali, Ethiopia,Laos. 6.) What percentage of the world’s population make up the highly developed nations? What Rich countries make up approximately 20 percent of the global human population, but consume approximately 80percent of the world’s resources. 7.) What is meant by “ecological footprint”? What is the average amount of productive land and water required to support a single human being living today? Explain why human consumption is putting the planet in ecological deficit? Ecological footprint (Mathis Wackernagel): help people visualize what they use from the environment. Each person has an ecological footprint, an amount of productive land, fresh water, and ocean required on a continuous basis to supply that person food, wood, energy water, housing, clothing, transportation, and waste disposal. Each person can use 4.7 acres (1.9 hectares). However the average global ecological footprint of each person is about 5.7 acres (2.3 hectars) it is deficit by 1 acre for each person. Sustainability: 8.) Distinguish between people overpopulation and consumption overpopulation. People overpopulation occurs when the environment is worsening because there are too many people, even if those people consume few resources per person. Consumption overpopulation results from the consumption-oriented lifestyles in highly developed countries. Consumption overpopulation causes pollution and environmental degredation. 9.) Give examples of renewable resources and nonrenewable resources.
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This document was uploaded on 11/02/2011 for the course BIOLOGY Bi 105 at Montgomery.

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Study Guide for Unit1 - Study Guide for Unit#1 Chapters 1 5...

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