Basica of ES/key issues, environmental thought/scientific thinking/systems, feedback loops, fundamentals of life Flashcards
the surroundings or conditions in which a person, animal, or plant lives or operates
environmental science
the natural world, as a whole or in a particular geographical area, especially as affected by human activity
environmental science
the surroundings of a physical system that may interact with the system by exchanging mass, energy, or other properties
environmental science
Physical sciences + social sciences (it is integrative)
Physics, chemistry, biology, geography
Political science, economics, communications
environmental science
a type of “is” statement
descriptive
a type of “ought” or “should” statement
prescription
Detailed accounts of factors involved in pollution, conservation of resources, population dynamics, etc.
observation
Our capacity for making observations is limited
uncertainty
Examining underlying premises/assumptions
Acknowledging uncertainty
critical/analytical thinking
Population stabilization in industrialized countries
Medical advances
Renewable energy sources
Increased political commitment to conservation
Increased access to information and education
Marine protected areas and improved fishery management
signs of progress
environment-focused values
ecocentrism
E.g., Aldo Leopold, Rachel Carson
eco-scientific
E.g., Buddhism, John Muir, and aesthetic philosophies
eco-religious/moral
human-focused values
anthropocentrism
E.g., Thomas Hobbes, John Locke, Adam Smith and the “invisible hand,” Garret Hardin and the “Tragedy of the Commons”
self-interest
E.g., Gifford Pinchot and Teddy Roosevelt
utilitarian/pragmatism
Scientific
Cultural, social, and indigenous
Emotional and visceral
forms of environmental knowledge
the intellectual and practical activity encompassing the systematic study of the structure and behavior of the physical and natural world through observation and experiment
scientific thought
a systematically organized body of knowledge on a particular subject
scientific thought
a systematic enterprise that builds and organizesknowledgein the form of testable explanations and predictions about nature and theuniverse
scientific thought
the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence
scientific thought
“Father of science”
Thales of Miletus
Predicted solar eclipse
Thales of Miletus
Most famous theory: water as the single material substance
Thales of Miletus
Proposed rational hypotheses: Earth floats atop water, earthquakes are the result of waves
Thales of Miletus
Major point: naturalistic explanation rather than supernatural explanation
Thales of Miletus
Logic, philosophy
Antiquity
geocentric model of universe
Ptolemy 1st century
observation of stars, rotation of Earth (rather than sky)
Aryabhata 5th century
invention of gun powder based on experimentation
Chinese 6th century
developed formal concept of scientific experiment, explained vision as light entering the eye
Alhazen 1000 CE
Copernican revolution
Enlightenment , “Scientific Revolution,” and broader adoption of empiricism
Information based on observation and measurement
mid-1500s
Based on observation of the natural and social world
All about asking “why” and “how” questions
Systematic search for knowledge
Cumulative – evidence supports theories, doesn’t prove them
modern scientific thought
logical, orderly, analytical assessment of ideas, evidence, and arguments
critical thought
network of interdependent components and processes, with materials and energy flowing from one component of the system to another
definition of system
Types of systems
open and closed systems
stable balance
Equilibrium
the outputs of a system are routed back as inputs
Feedback loops
changes in one state variable lead to an increase in that variable
positive loop
changes in one state variable lead to a decrease in that variable
negative loop
cannot be created or destroyed, but is recycled/changes forms
conservation of matter
matter that cannot be broken down into simpler components by ordinary chemical reactions
elements
smallest particles that exhibit the characteristics of an element
atoms
characteristics of atoms
protons (+), electrons(-), neutrons
number of protons in an atom, defining component of an element
Atomic number
same number of protons but different number of neutrons, different atomic mass
isotopes
all atoms or molecules in the substance are identical, exist in particular, fixed ratios
pure substances
substances that can’t be decomposed
elements
substances that can be decomposed
compounds
more than one type of atom or molecule in the substance; variable compositions (e.g., 50% sugar solution)
mixtures
gain/loss of electrons
electric charge
atoms that have gained/lost electrons
ions
negative ion
anion
positive ion
cation
give H+ ions into solution
acids
give OH– ions into solution
bases
concentration of H+ ions in a solution
pH
complex molecules based on chains/rings of carbon
organic compounds
fats/oils, store energy
lipids
sugars/starches, store energy
carbohydrates
made of amino acids, provide cell structure
proteins
sugar + phosphate + nitrogen base, DNA and RNA
nucleic acids