Science Project:

Which Type of Sponge Holds the Most Water?

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Research Questions:

What factors determine how much water a sponge will hold?

Sponges are useful for cleaning as it holds moisture. They are porous, which means they have tiny holes in them that allow cleaning fluid or water to be held. This does the cleaning job much more quickly than you bare hands or even a wash cloth.


Choose sponges of relatively the same size

Natural Sponges

  • Cellulose
  • Sea Sponge

Artificial Sponges

  • Polyurethane
  • Polyether (those rainbow packs)
  • Polyester


Large Bowl(s)

Measuring Beaker

Experimental Procedure

  1. Take one sponge and press it inside a bowl full of water. Let it drain a little.
  2. Squeeze the sponge until all of the water comes out in a measuring beaker. Record this measurement.
  3. Do the same for all the other sponges.
  4. Evaluate which one held the most water.
  5. Examine and compare the sponges and try to understand what properties might help one hold more water than another.

*Note: You may want to repeat this experiment for a few trials to be accurate.*

Suggested Chart

Amount of Water Held


Trial #1

Trial #2
Trial #3

Sea Sponge





Terms/Concepts: Sponge; Porosity; Absorbency


Author: Sofia PC
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