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Developing a New, Improved Cold Pack (page 2)

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Author: Muriel Gerhard

Terms, Concepts and Questions to Start Background Research

  • What is a control?  A control is the variable that is not changed in the experiment.
  • What purpose does a control serve? It is used to make comparisons as to what changed or possibly caused the change.
  • What are variables?  Variables are factors that can be changed in an experiment.
  • What is an independent variable? The independent variable is the one that is changed in the experiment.
  • What is a dependent variable? The dependent variable is the one that changes as a result of the change in the independent variable.

Charting and Graphing Data

In each section of the experiment, use charts to display the obtained data such the following sample:

Cup

 

Chemical Used

 

Beginning Temperature

 

Ending Temperature

 

A

 

 

 

 

 

 

B

 

 

 

 

 

 

 

C

 

 

 

 

 

 

 

D

 

Control

 

 

 

 

 

Cup

Chemical

Mass of Cup With Water

Mass of Cup With Water & Chemicals

Temperature Before Chemicals Added

Temperature After Chemicals Added

Temperature After More Chemicals Added

 

A

 

 

 

 

 

 

B

 

 

 

 

 

 

C

 

 

 

 

 

 

 

When comparing the chemicals to determine their effects on the temperature of water over time, graph the data.

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