Does the density of the clay change if you cut the clay in half?

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# Does the density of the clay change if you cut the clay in half? - PowerPoint PPT Presentation

Does the density of the clay change if you cut the clay in half?. Manipulated Variable. The variable that is changed in the procedure is stated (or implied) in the written procedure. For our question: Cut the chunk of clay in half. Responding Variable.

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## PowerPoint Slideshow about 'Does the density of the clay change if you cut the clay in half?' - constance-murray

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### Does the density of the clay change if you cut the clay in half?

Manipulated Variable
• The variable that is changed in the procedure is stated (or implied) in the written procedure.
• For our question:
• Cut the chunk of clay in half.
Responding Variable
• The change in the results because of changing one variable (manipulated) is stated or implied in the written procedure.
• For our question:
• The resulting density of the clay.
Controlled Variables
• Variables that are kept the same, it is either stated or implied in the procedure.
• For our question:
• Chunks have come from the same original piece/brand.
• Same balance used for massing clay.
• Same method and instruments used for finding volume.
• Each initial chunk needs to be the same volume/size.
• Temp of clay stays the same.
• Temp of room must stay the same.
Repeated Trials
• More than one trial is planned and carried out.
• For our question:
• Repeat the entire procedure 2 more times (finding the density of the large chunk and small chunk) for a total of 3 trials.
• Stating – “repeat the procedure” is not adequate. Must state which steps to repeat and how many times.
Record Measurements
• Procedure includes instructions to “record” measured or observable data periodically throughout the procedure.
• For our question:
• Record the volume of each chunk of clay.
• Record the mass of each chunk of clay.
• Record the density of each chunk of clay.
Logical Steps
• The steps of the investigation are logical with enough detail to repeat the procedure effectively.
• For our question –
• Correct sequenced (1st, 2nd, 3rd, …)
• Not in paragraph form.
• Someone from another class (i.e.: Mrs. William’s 6th graders should be able to follow each step without having to ask any questions).