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Contributed by: Oregon State Department of Education
Materials
Density:
- blocks of various materials and sizes
- clay, butter, candy bars, and other foods
- 2 balls
- triple-beam balance or scale, and metric ruler
- wide-opening graduated cylinder (100 - 200 ml)
- water displacement canister or 500 ml beaker
- calculator
Buoyancy:
- 35mm film canister
- materials to fill canister
- marking pens
- masking tape
- wide-mouth jar
- two-liter soda bottle cut in half or 500ml beaker
- triple-beam balance or scale
- metric ruler
- calculator
Directions
Your task is to plan, design, and conduct an investigation to answer
a scientific question. The question is: "Come up with a question
that addresses the factors (variables) of the water and its effect
on whether an object will float or sink." You may use any of
the materials and equipment in the laboratory for your investigation
of this question.
1) Under the heading "PROCEDURE" list, in order, the steps
you will use to answer the question. You may include a diagram
to help illustrate your plans for the investigation. Include any
safety procedures you would follow. Make your procedure detailed
enough, so someone else could follow it easily.
- Construct a data table or chart or indicate any other method
you could use to record your observations and results that will
be obtained.
- Perform the investigation by following the steps outlined in
your procedure. Be sure to note any changes to your listed procedures
and tell why.
- Under the heading "RESULTS" record your observations and measurements.
Write statements or paragraphs and/or use tables and graphs where
appropriate.
- Under the heading "CONCLUSIONS," write an interpretation and
analysis of your results. Note any limitations to your investigation.
What additional investigations or questions were suggested as
you did your investigation?
- Under the heading "SCIENTIFIC QUESTION," based on what you learned
in your investigation, write your own question that can be answered
with further scientific inquiry using the same classroom materials
that you had for this investigation.
- Write a report of your investigation, including the sections
mentioned above.
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