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Performance Task:
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Note to teacher: For this activity, students will
need corn oil, rubber bands, capillary melting point tubes, thermometers,
paper towels, and centimeter rulers. In this inquiry, you will investigate
how the temperature of a gas affects its volume at constant pressure. Using
two rubber bands, attach a capillary tube to the lower end of a thermometer
with the open end of the tube placed near the thermometer bulb. Immerse the
tube and thermometer in an oil bath heated to 130 degrees Celsius and wait for the thermometer to reach the temperature of the oil. When this
occurs, remove the tube and thermometer from the bath and lay the tube and
thermometer on a paper towel. Make a reference line on the paper at the
sealed end of the capillary tube and mark the upper end of the oil plug.
Alongside this mark, the temperature is recorded. Make at least six
recordings of temperature and the length of the air column as the
temperature drops. The final mark and temperature is recorded when the oil
in the tube is near room temperature. Prepare a graph plotting the data
with length on the vertical axis and
temperature on the horizontal axis. By analyzing your data and
graph, make at least one conclusion concerning the relationship
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Knowledge / Skills:
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Know and apply the principles of scientific
inquiry. (xs1)
Make observations of the local environment using
senses and instruments. Inferences and interpretations are arrived at based
on observations. Classify observable properties and organize observations
in a meaningful and logical way.
(s5)
Exhibit good data management skills by
collecting, organizing, and graphing data.
(s19)
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