In this lesson, our instructor Bryan Cardella gives an introduction on the big picture of Environmental Science. He discusses the types of systems, open systems, positive and negative feedback, types of flows, overshoots, collapse and consequences, and the Earth as a system.
Closed systems and open systems (which typically occur in nature) must be considered in environmental science, along with inputs and outputs. A static system is not as common or realistic as a dynamic system
Open systems are steady-state or non-steady state. Over time, dynamic equilibrium can exist in the system. Average residence time (ART) applies to determining how much of a presence a molecule or substance has in a system over time
Feedback occurs when the output of a system affects its input. Negative feedback is when the a certain level of output leads to a decrease in the output, and positive feedback is when an increase in the output leads to a further increase
Flow (linear flow, nonlinear flow), flux, and lag time must be considered with data. Curves can be: linear, logistic, and exponential.
Overshoots (exceeding the maximum amount that is supportable) can lead to collapse once the carrying capacity is exceeded. The consequences may be reversible depending on the scenario.
When considering Earth as a system, environmental unity, Uniformitarianism, and the Gaia hypothesis are all helpful in considering what the data is telling us.
The Big Picture of Environmental Science
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book includes a comprehensive review of the key AP Environmental Science concepts and targeted strategies for acing every section of the exam. Additionally, the book includes two full length practice tests with full answer explanations.
This book is an updated manual that offers a brand-new diagnostic test to pinpoint the test taker's strengths and weak areas, two full-length practice exams with all questions answered and explained, a detailed review of all test topics, supplemented with practice questions and quizzes with answers, an overview of the test plus helpful test-taking strategies, and hundreds of diagrams and illustrations .