🙏 Free review 2020
Required Environmental Legislation
Major Environmental Disasters
✍️ Free Response Questions (FRQs)
🏜 Unit 1: The Living World: Ecosystems
1.1Introduction to Ecosystems
1.10Energy Flow and the 10% Rule
🐠 Unit 2: The Living World: Biodiversity
2.5Natural Disruptions to Ecosystems
👪 Unit 3: Populations
3.0Unit 3 Overview: Populations
3.1Generalist and Specialist Species
3.2K-Selected r-Selected Species
🌏 Unit 4: Earth Systems and Resources
4.3Soil Composition and Properties
🏖 Unit 5: Land and Water Use
5.7Meat Control Methods
5.9Impacts of Mining
⚡️ Unit 6: Energy Resources and Consumption
6.0Unit 6 Overview: Energy Resources and Consumption
💨 Unit 7: Atmospheric Pollution
7.1Introduction to Air Pollution
7.5Indoor Air Pollutants
7.6Reduction of Air Pollutants
♻️ Unit 8: Aquatic and Terrestrial Pollution
🔥 Unit 9: Global Change
9.1Stratospheric Ozone Depletion
9.4Increases in the Greenhouse Gases
karla jauregui sandoval
May 1, 2020
Image Courtesy of Pixabay
Humans experience population growth or decline through infant mortality rates, birth rates, immigration, emigration and the development of a country. Factors that go into a population declining or increasing are access to family planning, nutrition, education and jobs.
Industrialization enabled the human population to grow because there was an increase in sanitation, food and medicine. These basic needs allowed people to live a longer healthier life.
A way to predict the doubling time of a population size is by the rule of 70. This rule states that dividing the number of 70 by the percentage population growth rate approximates the population doubling time.
Just like there is a carrying capacity for smaller habitats, Earth also has a limit of finite resources which can support
Example: A population of birds on a small island has an annual population growth of 2.5%. What is the doubling time for the population ?
There are two types of factors that can limit population growth - density independent and density dependent.
A density independent factor is a limit on population growth regardless of population density (size). Some examples of density independent factors are weather, climate, storms, fire, heatwaves, or droughts. For example, the tsunami that hit Japan in 2011 killed people regardless of the population size. A tsunami is not preventable and can not be controlled by competition with resources.
However a density dependent factor is affected by the size of a population. Some density dependent factors are access to clean water, air, food availability, disease, and territory size.
Annual Percent Change ➪ this formula is used to calculate the change in population
2550 north lake drive
milwaukee, wi 53211
92% of Fiveable students earned a 3 or higher on their 2020 AP Exams.
*ap® and advanced placement® are registered trademarks of the college board, which was not involved in the production of, and does not endorse, this product.
© fiveable 2020 | all rights reserved.