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Classifying Rocks
Task with Student Directions
Contributed by: New York State Alternative Assessment in Science Project (NYSED)

Task: At this station, you will be observing the effects of water on different colored dots.


  • 1 filter paper with colored tabs

  • 1 cup with water

  • Paper towels


  1. In front of you are a small cup of water and a piece of cut filter paper.

  2. Bend the tabs with colored dots upwards as shown in the diagram.

  3. Next, turn the paper upside-down and place the four tabs into the small cup. Be sure the colored dots are above the water surface, but be sure that each of the tabs is touching the surface of the water.


  4. After about 1 minute, when the first color reaches the top of the tab, remove the paper and flatten it out on a paper towel.

Colored Dots 1

Answer Sheet

  1. Describe what you observed about each of the dots.

    Blue Dot

    Yellow Dot

    Red Dot

    Red Dot

  2. Explain why the red dots acted differently from each other.

NYS Alternative Assessment in Science Project
NSF Grant #MDR-9154506
Copyright, April 1996
The State University of New York
The State Education Department
Albany, New York 12234


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