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Scientific Investigations

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by

Rebecca Hertling

on 27 September 2013

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Transcript of Scientific Investigations

Before Experiment
After Experiment
During Experiment
Scientific Investigations
(cc) photo by jimmyharris on Flickr
Investigators ask a question
They research the problem
Predict a relationship - Hypothesis
Make a plan for the experiment
Only one thing is changed on purpose
Independent Variable
Make Observations
No Inferences
Measure what changes because of what you did
Dependent Variable
Analyze the results
Make charts and graphs
Show data in a way that is easy to understand
Make inferences
Try to explain what happened
Example
Independent Variable
Dependent Variable
Keep everything else the same to keep it fair
Controlled variables
Must have a group that is "normal" to compare the results to
Control Group
Experiments are how scientists make observations and collect data to learn things
To make sure the results were not a mistake
Must be able to be repeated
Mean, median, mode, range
Use math
Controlled Variables
Control Group
Food
Feathers
Water
Living Conditions
Species of chicken
Regular Food
Full transcript