Intro Flashcards
(44 cards)
Population Density
measurement of population per unit or unit volume; it is a quantity of type number density
World population
Around 9 billion
Biosphere
the global ecological system integrating all living organisms and their relationships
Biosphere and CO2
important reservoir in the carbon cycle and has a very significant impact of climate through release and removal of CO2, from the atmosphere.
Carbon Cycle Resevoirs
- Atmosphere
- Land-living animals and plants or their by-products
- Oceans, including animals and plants living there
- Sediments, including in fossil fuels
Carbon Cycle
The movement of carbon through biological, atmosphere, chemical and geological.
Sustainability
How biological systems remain diverse and productive
Attributes of Sustainable Economy
Energy policies that do not pollute the atmosphere
Finding cleaner renewable energy: windmills
Path to Sustainable Economy
- Develop effective population control.
- Better education.
- Restructured energy programs.
- Economic planning and tax structure that encourages population control and wise resource use.
- Implement changes to help maintain a quality local, regional and global environment.
- Commitment of people
Gaia Hypothesis
over the history of life on earth, life has profoundly changed the global environment and the chances for the continuation of life. According to the ability for life on earth is going down, but human population is going up.
What is more important: quality of life of current living people or quality of life of future generations?
Open ended
Accuracy
Is it true
Precision
Can this statement be more specific, detailed
Relevance
How is the statement connected to the problems
Depth
Are humans ready to deal with complexity?
How do you evaluate information
- Currency: What is the publication date of these resources?
- Authority: Who is the author and publisher?
- Validity/Accuracy: Is the info accurate or valid?
- Audience: Who was the resource written for?
- Point of view (bias): What is the resources point of view?
What is science concerned with?
disprovability- is there a method to test or disprove it
Basic Assumptions of Science
- Knowledge is superior to ignorance.
- Events in nature follow an orderly, consistent, and knowable patterns.
- All explainable phenomena have natural causes. The scientific approach doesn’t include religious, spiritualistic, and magical explanations.
- Nothing is self evident. Knowledge is only derived rom empirical acquisitions’
Scientific Method
• Steps: Observations. Formulation of hypothesis to explain the phenomenon. Evaluate and experiment tests. Get new knowledge
Theory vs. Hypothesis
Theory is a hypothesis that has been confirmed through repeated tests
Hypothesis is a proposed explanation
Why was fire first used
Tanzanians used it to clear forests
Helocene period
start of warm period and melt water pulse that increases sea level 20 m
Bering Land Bridge
How the native americans got over
What is the thermal maximum
its the warmest period in the past 12500 years