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OBSERVING AND INFERRING
Observing and Inferring | Semester 1, Unit 1
You are already an inference maker.
of this lab is to show you how to formalize
Materials and Equipment
0.1M HCl (an acid)
0.1M KOH (a base)
Bromothymol blue (BTB)
Ruler with mm markings
Materials Not Included
Inference (noun): A conclusion reached
upon the basis of evidence and reasoning.
Synonyms: Deduction, conclusion,
reasoning, conjecture, speculation, guess,
presumption, assumption, supposition,
Everyone often uses inferences.
someone comes in from outside and is
all wet, you might infer that it is raining
You see a trash can rolling down
the road and you might infer it is windy
Sometimes we use inferences to
For example, you see
dark rolling clouds.
You might infer that it
is going to rain.
if you see the numbers 2, 4,
6, and 8, and you had to infer what number
would come next in the pattern, you would
Inferences are even used in
the sciences. For instance, a meteorologist
(scientist who studies weather and climate)
might gather data and, based on that data,
and infer there is a high chance of rain.
While inferences are in a way, an educated
guess, they can be used to help guide us
into greater scientific truth.
In this lab, you will exercise and
refine your already innate ability to
make inferences into the unknown. Your
inferences will be grounded in known
information, and guided by science.
you will be seeing how a drop of each
of the reagents wicks through paper.
SAVE THE PAPER TOWEL USED IN EACH STEP
FOR LATER STEPS.
1. Fold a white paper towel so that it is four
layers thick and flatten it.