Conclusion – Adhesion/Cohesion Lab: Page 99 <ul><li>Copy these definitions and answer the three conclusion questions. </li...
Surface Tension Lab – Page 100 <ul><li>Question: How many paperclips can you add to a full cup of water? </li></ul><ul><li...
Data <ul><li>How did the top of the cup look </li></ul><ul><ul><li>After 10 paperclips: </li></ul></ul><ul><ul><li>After 2...
Conclusions – page 101 <ul><li>Surface Tension: the tendency of a liquid to reduce its surface </li></ul><ul><li>If the nu...
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01 13-2012-warm up lab

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01 13-2012-warm up lab

  1. 1. Conclusion – Adhesion/Cohesion Lab: Page 99 <ul><li>Copy these definitions and answer the three conclusion questions. </li></ul><ul><ul><li>Adhesion: the attraction of water molecules to other substances </li></ul></ul><ul><ul><li>Cohesion: the attraction of water molecules to other water molecules </li></ul></ul><ul><li>If the number of drops is very different from your hypothesis, explain what accounts for the difference. </li></ul><ul><li>Explain your results in terms of cohesion. </li></ul><ul><li>Oxygen gas can only move into cells through wet surfaces. Explain why it is important that water is adhesive. </li></ul>
  2. 2. Surface Tension Lab – Page 100 <ul><li>Question: How many paperclips can you add to a full cup of water? </li></ul><ul><li>Hypothesis: </li></ul><ul><li>Materials: </li></ul><ul><ul><li>Paperclips </li></ul></ul><ul><ul><li>Cup of water </li></ul></ul><ul><li>Procedures: </li></ul><ul><ul><li>Fill your small cup completely with water. </li></ul></ul><ul><ul><li>Slowly slide paperclips down the side of the cup counting the number of paperclips added. </li></ul></ul><ul><ul><li>Examine the cup from the side after adding 10 paperclips, 20 paperclips, and just before it overflows. </li></ul></ul>
  3. 3. Data <ul><li>How did the top of the cup look </li></ul><ul><ul><li>After 10 paperclips: </li></ul></ul><ul><ul><li>After 20 paperclips </li></ul></ul><ul><ul><li>Just before it overflows </li></ul></ul>Group # of Paperclips Average
  4. 4. Conclusions – page 101 <ul><li>Surface Tension: the tendency of a liquid to reduce its surface </li></ul><ul><li>If the number of paperclips was very different from your prediction, explain what accounts for the difference? </li></ul><ul><li>Explain your results in terms of surface tension. </li></ul><ul><li>How do insects walk on water? </li></ul>

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