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Science Principles
3
Transcript
Science Principles
Chapter 2
Science
Vocabulary
Let's see what you remember...
- Matter
- Atom
- Atomic Theory
- Element
- Compound
- Chemical Formula
- Protons
- Neutrons
- Electrons
- Atomic Number
- Mass Number
- Isotope
- Ion
- pH
- Organic Compounds
- Inorganic Compounds
- Four Macromolecules
- Cell
- Cell Theory
- Gene
- Trait
- Chromosome
Scientific Method
Identify a problem/make observations
Research
Develop Question
Scientific Method
Experiment/Collect Data
Analyze Data
Develop Hypothesis/make predictions
Experiment/Collect Data
Analyze Data
Where to next
Scientific Reasoning
Scientific Theories & Laws
- Scientific Theory
Scientific Theories & Laws
- Scientific Law
- Paradigm Shift
Results of Science
- Tentative Results or frontier science: preliminary results
- Reliable Results: developed using the scientific method, peer review, & widely accepted by scientific community
Results of Science
- Unreliable Results: presented as reliable but without being reviewed or rejected through peer review
Science Focus: Global Warming
Science Focus: Global Warming
- How much has the earth’s atmosphere warmed during the last 50 years?
- How much of this warming is due to human activity?
- How much is the atmosphere likely to warm in the future?
- Will this affect climate?
Core Case Study
Core Case Study
- What was the purpose of the experiment?
- How did the scientists use the scientific method?
- What were the major findings of the experiment?
Law of Conservation of Matter
Matter cannot be created or destroyed.
Matter
How do you think this relates to environmental issues?
Laws of Thermodynamics
First Law: energy can not be created or destroyed, only converted.
Energy
Second Law: when energy changes from one form to another, we always end up with lower-quality of energy.
Systems
Inputs & Outputs
Inputs & Outputs
Feedback
Feedback
Positive Feedback
Negative Feedback
Time Delays
Tipping Point or threshold level: a fundemental shift in the behavior of a system.
Time Delays
Climate Tipping Point?
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