Contributed by: New York State Alternative Assessment in Science
Project (NYSED)
1996 Administration
Task: At this station, you will be determining which of
two solutions is liquid X and which is liquid Z.
Materials
- bottle containing a blue liquid
- bottle containing a yellow liquid
- triple beam or double pan balance
- calculator
- eye goggles
Directions
The labels on the two bottles have fallen off. The labels had
read "Liquid X" and "Liquid Z." Your job is to determine which bottle
contains liquid X and which contains liquid Z. The real challenge
is that you must do this without opening the bottles. All
of the information you need to reach your conclusion is listed in
the box below:
- The bottles and lids are identical in mass, volume,
and shape when empty.
- Both bottle contain the same volume of solution.
- The density of liquid Z is greater than the density
of liquid X.
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- In the space below, list the steps you will follow to determine
which bottle contains liquid X and which contains liquid Z.
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- Put on eye goggles. Be careful not to drop either bottle.
CARRY OUT YOUR PLAN.
- Record the results of your experiment in the space below.
*Show all work.*
- Using the data collected in your experiment, which liquid is
liquid X and which is liquid Z?
Blue Liquid _______________ Yellow
Liquid ________________
- Based on the results of your experiment, write a statement explaining
the relationship between mass, volume, and density. Writing the
formula is not sufficient.
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NYS Alternative Assessment in Science Project
Copyright, April 1996
The State University of New York
The State Education Department
Albany, New York 12234
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