Group+5

=Group 5 Lab Reports=

Purpose: The purpose of this experiment is to determine the effect of cohesion and adhesion. Harry

Hypothesis: I predict that the colored vis-s-vis maker will spred the furthest. Gynu

Materials: Gynu vis-a-vis maker 600 ml beaker water pencil scissors permanent maker filter paper

Procedure: Gynu 1. Cut three pieces of filterpaper strips that are about each 12 cm long. 2. Choose a black or brown vis-a-vis marker. 3. On one of the strips, draw a dark line horizontally along the width of the bottom for the filter paper that is 1.5 cm from the bottom edge. 4. Write your name on the top edge of your strip with a pen or pencil. 5. Repeat steps #3 & 4 using a color of your choice vi-a-vis marker. 6. Repeat steps #3 & 4 using a color of your choice permanent marker. 7. Put roughly 100 ml of water in your breaker. 8. Fold the top of your filter paper strips, hand your strips over the pencil so that the bottom edges touch the water. 9. Make observation about what you see occuring. 10. Let your srtips sit in the beaker for about 5 to 10 min. 11. Pull strips out and let them dry. 12. Someone from your group should save the strips for later use.

Observations: Julia
 * Marker || Obesrvations || Pictures ||
 * vis-a-vis marker (black or brown) || Spread up and down || [[image:vikings8thgradeearthscience/IMG00170.JPG width="284" height="174"]] ||
 * vis-a-vis marker (color) || Spread out the most ||  ||
 * permanent marker || No change ||  ||

Analysis: As we predicted, the pigments of the green marker were most affected by the water. It separated into blue and yellow and spread upwards and down as well. The black vis-à-vis marker was also affected, and spread into pigments of brown and yellow. However, the permanent marker being water resistant, did not move. Julia

Conclusion: After the experiment, our hypothesis that the colored vis-a-vis marker will spread the furthest became evident. We believe that through adhesion, the colored marker spread out the furthest. For the parmenent marker, it spread out the least distance since it is water proof. An error occured in this experment where the filter papers were left in the water for a shorter period of time than it was required. This adhesion property can be used to understand how to make a swimsuit that is water proof. Harry J