1.1 Scientific Method Chapter 1. Warm-up What is “science?”
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Transcript of 1.1 Scientific Method Chapter 1. Warm-up What is “science?”
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1.1 Scientific MethodChapter 1
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Warm-up What is “science?”
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Objectives Students will be able to:
Outline the steps of the scientific method Make inferences based on data Design a controlled experiment Identify DV & IV
Standards: BIO.B.3.3.1
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What is “Science?” An organized way to use evidence to
learn about the natural world
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Where does evidence come from? OBSERVATIONS! Scientists use observations to gather
data
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Types of Data QuaNtitative
Numbers data Examples?
Qualitative data Observations Examples?
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What next? Observation: You are sitting in a train
station. A man carrying a briefcase runs past you.
You make an inference A logical interpretation of observations
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Testing Evidence Ask a scientific question…
A question that can be answered through experimentation
Examples of a scientific question: Does Pepsi have more carbonation than
Coke? What is the effect of smoke on lung
cancer?
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Testing Evidence What is a non-scientific question?
Did Abraham Lincoln like the color blue? Is Monday night football more fun to
watch that Sunday night football?
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Testing Evidence Scientific Question or no?
Why is basketball a boring sport? Did grass turn brown because it needs
fertilizer? Does studying for a test positively impact
the result? Why is Dunkin’ Donuts coffee tastier than
Wawa’s?
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Answering the question A hypothesis is a possible explanation
for a set of observations A possible answer to the scientific
question
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Answering the question True or False:
There is only one hypothesis for a set of observations.
It needs to be a testable statement A hypothesis is always correct
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Activity: Inference Cubes
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So you have a hypothesis… How do you figure out if your hypothesis
is correct? Answer: EXPERIMENTATION
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Designing an Experiment An experiment tests an hypothesis An experiment compares two or more
groups Ex: fertilizer vs. no fertilizer
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Designing an Experiment An experiment involves variables Variables = factors that can change
Controlled variables: variables that are the same in the two groups
Independent or manipulated variable: the single factor that is different between the two groups
Dependent or responding variable: the result of the experiment, what is measured
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PracticeControlled variable
Independent or manipulated
variable
Dependent or respondent
variable
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Practice: Redi’s Experiment
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Activity: Simpson’s Experiments