EES 108 Class 03

EES 108 Class 03 - Homework Review • Temperature 63°F...

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Unformatted text preview: Homework Review • Temperature? 63°F • Dewpoint? 60°F • Pressure? 999.8 millibar (998 99.8 999.8) • Cloud cover? 50% of the sky covered by clouds • Current Weather? Thunderstorm with intermittent rain Homework Review • Temperature? 43°F • Dewpoint? 20°F • Pressure? 1011.7 millibar (117 11.7 1011.7) • Pressure tendency? Steadily rising. Pressure rose 1.7 mb in last 3 hours • Cloud cover? 0% (No significant clouds) • Wind? 25 knots from southwest How does science work? • How does science provide reliable knowledge? Three part method 1. Make observations, notice patterns 2. Invent hypothesis • General rule describing patterns of behavior in nature • To be scientific, hypothesis must be testable • Falsifiability : If a scientific hypothesis is wrong, you can prove that it’s wrong 3. Test hypothesis • Try to prove it wrong • The more you try to prove it wrong, but fail, the more you can trust the hypothesis You never prove a hypothesis is correct. You just decide how much testing is enough Theories • How is a theory different from a hypothesis? • Two things: A theory is extensively tested and trusted A theory is more comprehensive • Hypothesis describes one regular pattern • Theory comprises many hypotheses – Richer, more comprehensive – Provides a comprehensive explanation of a wide range of natural phenomena Example • Hypothesis: Whenever a parcel of air is raised 1 kilometer, its temperature will fall by 10 K Is this “scientific”? How could you test it? • Theory: Take a collection of hypotheses and put them together to describe and explain patterns of climate around the world Ozone (O 3 ) • Ozone is naturally created by interaction of oxygen molecules with ultraviolet light from sun. Creation of ozone Ozone Layer...
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EES 108 Class 03 - Homework Review • Temperature 63°F...

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