Black Box. Science Any approach that involves the gaining of knowledge to explain the natural world...
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Transcript of Black Box. Science Any approach that involves the gaining of knowledge to explain the natural world...
![Page 1: Black Box. Science Any approach that involves the gaining of knowledge to explain the natural world Scientists test ideas by gathering evidence It is.](https://reader030.fdocuments.us/reader030/viewer/2022032722/56649cf15503460f949c040a/html5/thumbnails/1.jpg)
Black Box
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Science Any approach that involves the gaining of knowledge to explain the natural
world
Scientists test ideas by gathering evidence
It is a very creative endeavor
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Hypothesis testing Hypothesis are “educated guesses” which are potential explanations of a
particular natural phenomenon
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Flower bed example Two flower beds
Seeds from same packet
One in front yard/one in back yard
You notice the plants in front yard are much taller than those in the back
You come up with several possible explanations (hypotheses) as to why
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Hypothesis – more light in front yard What evidence do you gather to test this idea?
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You could place light meters in the front and back
If light is shown to be greater in front, your hypothesis is supported.
OR you can test assumption by testing directly by setting up an experiment, growing seeds under different light conditions.
You would predict that before plants grew, that the seeds exposed to more light would grow taller.
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In both experiments Gathering evidence to test your hypothesis that light exposure differences
may lead to difference in plant growth.
The results of tests of ideas may either support or fail to support a particular hypothesis.
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If the results fail to support original hypothesis A new revised hypothesis can be formed and tested
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If the hypothesis supported by results IT DOESN’T MEAN A STOPPING POINT HAS BEEN REACHED
Just because there is a correlation between the amount of light the two sections of your yard receives and plant height
And light contributes to plant growth does not necessarily mean that different light levels has caused the differences in plant heights you observed between your front and back yards. Some other factor might be the prominent contributing factor (soil, watering).
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Scientific theory A well substantiated explanation of some aspect of the natural world that
can incorporate facts, laws, inferences, and test hypotheses.
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When finished – report to class Approach taken to the problem
Hypothesis constructed
Steps used to test hypotheses
Revisions to hypotheses inspired by testing process
Two object you feel are in the Black Box and why
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Warm Up – September 2, 2014 You will need a new piece of paper
Make sure to have your name, period and date on your warm up
Last week your participated in the Black Box lab. At the end of class, you predicted what two objects were in the box. How sure are you that it is these two items? Please give a percentage for each object – for instance, object “A” 90% sure and object “B” 25% sure.
What would you need in order to feel 100% about your prediction for both objects?
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Presentations Each group will present how they came to consensus on what is in the Black
Box. What steps/procedure did you take specifically (weight, sound, a combination of the two, etc.)?
Each group will present what two items they believe is in their Black Box and why they think this. You will also present a percentage to show how sure you are of your results (10% sure? 95% sure).
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AFTER PRESENTATIONS
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Did you all approach this problem the same way?
Prediction – inference about the future based on your observations
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No! Science is a creative process
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The “Black Box” is a metaphor for Science
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Black Box
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White Box
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Think about these questions? How does the body heal a broken bone?
Why does water expand when it freezes?
How does a tree convert sunlight to energy for growth?
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How do we turn the black box to white? Come up with possible explanations for how things might work
Test, revised, and retested ideas
This is how science inquiry works
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Science cannot absolutely verify something as true… Can we get consensus on what is in the black box?
Back to testing! You may use techniques others reported for yourselves in the second go at determining what is in the Black Boxes.
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New Poll – What Do We Think Is In The Black Box Now?
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Well? Did we change our ideas? Let’s see Has the community discussion and/or additional examination using new
approaches changed the proportion of teams that feel a particular pair of item is in the black box or that a particular item is present?
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Dissenting views drive further assessment And are welcomed
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Science cannot completely verify something as true The interaction of the various element of science often leads to new
techniques, tools, and approaches, allowing scientist to have greater confidence in their assessment of questions.
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New Techniques and/or Technology New approaches may be developed based on inspiration from other
scientific work or even result from arguments made by scientists with dissenting opinions concerning the consensus view of prior testing of an idea.
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X-Ray While we are moving towards the truth, we cannot truly verify what is in the
Black Box. If we could, it would no longer be a black box but a white box.
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What if you just guessed what was in the box? Would your percent of accuracy be higher or lower?
Why? What did we use that increased the accuracy of our prediction?
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Can you match what you did to this chart?
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Vocabulary ISNs – page 21 Prediction – an inference about the future based on your observations