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What is Science?
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The Goals of
Science
1. Deals only with
the natural world
The supernatural is
outside the realm of
science
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2. Collect and Organize Information
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3. Propose explanations that can be
tested
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Summarizing..............
SCIENCE is a body of knowledge that
explains the natural world.
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Science Begins with
OBSERVATIONS
**Try an
exercise in
observation.
How good are
your
observing
skills?
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Data = information gathered from
observations
Quantitative = a quantity, a number or measure
Qualitative = a quality, description
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INFERENCE - a logical interpretation
based on prior knowledge
* Drawing a conclusion
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HYPOTHESIS - a proposed
explanation, must be testable
Examples:
1. Purina food will reduce a dog's shedding.
2. Putting Miracle Grow on tomato plants will make them
produce more tomatoes.
3. The drug Avapro will lower a person's blood pressure.
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Scientific Method:
1) Ask questions, make observations
2) Gather information
3) Form a hypothesis
4) Set up a controlled experiment
Imagine how you would
test a particular fertilizer
to determine if the
fertilizer would grow taller
plants.
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Independent variable - the thing you change
Dependent variable - what you observe or
measure
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After you have designed your experiment
5)Record and analyze results
6)Draw a conclusion
7)Repeat
Does more fertilizer = better growth?
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Example of Scientific Method in Action
Question: What causes bromothymol blue to change colors
when you blow into the straw?
Question 2: Do fish grow faster if they are raised in a larger
thank?
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***Field studies, models ***
Field Studies - when nature is observed in its natural state
Models - using computers to make a representation of a
process, idea, or structure