Transcript Chapter 2 Labs Set-up

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To investigate how living cells regulate pH, you will be using water and a
homogenate and acid and base. The homogenate, made from cells (plant or animal)
that were recently living, will model the internal environment of a living organism
and it’s response to change.
Dependent variable: pH
Lab 2
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Heating Curve of water:
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Chapter 2 Labs Set-up
Lab 1
When a system is heated, energy is transferred into it. In response to the energy it
receives, the system changes, for example by increasing its temperature. A plot of the
temperature versus time is called the heating curve. The rate of temperature increase
will be dependent on the heat capacity of the system. When the heat capacity is large,
the temperature increases slowly, because much energy is required to increase its
temperature by one degree. Thus, the slope of temperature increase is different for the
solid, liquid, and gases states & for salt water, sugar water, and distilled water.
Independent Variable: salt water, sugar water, distilled water
Dependent Variable: Temperature over time
One constant: 30 second time intervals for at least 15 minutes
Set-up:
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Question, hypothesis (if…then…because…), constants, control,
independent/dependent variables, data tables