Vanishing Volume Review
This experiment was all about particle size and how when 2
substances are mixed which have different particle sizes,
there will be a loss of volume.
The greater the difference in the particle size between the
two substances, the greater the loss in volume.
Therefore:
Rubbing Alcohol vs. Water ~ after adding the rubbing alcohol
to the water, the volume loss was not as great as the other
experiment, but there was some loss.
~ this means that the difference in particle size between the
two substances was not that great.
~ the rubbing alcohol was able to find some spaces between
the molecules of water but not much as their size difference
wasn’t that great.
Water vs. Sand ~ after adding the water (slowly) to the sand,
the water pushed between the particles of sand pushing out
the air and replacing it.
~we saw air bubbles coming from the beaker as the water was
being added
~the difference in particle size between the sand and water is
very large therefore the loss in volume in the beaker was
greater than that of the Rubbing Alcohol and water.
Sand vs. Marbles ~ after adding the sand to the marbles,
(slowly) the sand was able to move quickly between the
marbles.
~the marbles are so large, that they created large pockets of
space for the sand to move between
~this created the largest loss in volume as the sand was able
(with help from the teacher - shaking the beaker to level it
off) to find more spaces between the marbles.
Questions for Consideration in Your Conclusion
1. What was the loss in volume in your experiment?
2. Explain why your experiment lost so much or so little
compared to the other experiments.
3. What would have happened if I had added the substances in
a different order? Example: marbles to sand