Surface Tension Lab Report

Posted: January 20th, 2023

Have you ever wondered why water, if it is not being disturbed settles down into a nice smooth surface? It is actually the result of a phenomenon known as SurfaceTension.
Water molecules are drawn to each other because of a force called cohesion. The water molecules below the surface of a body of water are all attracted equally to each other. Those on the surface of the water are pulled downward by the molecules underneath, and sideways by the water molecules around them, which results in a sort of “skin” of water being formed on top. This “skin” is called SurfaceTension.
To demonstrate, try the folowing Lab Experiment:
Purpose: To learn more about SurfaceTension.
Hypothesis: Students must read through the procedure and then formulate their own hypothesis
Materials: a bowl, water, black pepper, a drop of liquid dish soap
Procedure: Students must complete the following procedure.

Fill the bowl with water.
Sprinkle some black pepper on the surface of the water.
Record what happened on the attached Lab Sheet.
Wash your hands.
Dry them well.
Touch the tip of your index finger to the surface of the water-pepper mixture
Record what happened on the attached Lab Sheet.
Put a drop of liquid soap on your fingertip.
Touch a drop of the soap to the surface of the water-pepper mixture.
Record what happened on the attached Lab Sheet.

Results: Students must describe their own results on the attached Lab Sheet.
Conclusion: Students must draw logical conclusions based on their observed results
 

Rubric for Research Paper

 
 
Outstanding – 20pts
Good  – 15pts
Fair – 10pts
Unacceptable – 5pts

 
Outline
 
Excellent section headings, indicative of a steady “flow” to the overall paper. Topics and subtopics clearly indicated.
Professional looking.
Good section headings, indicative to a steady “flow” to the overall paper. Topics clearly indicated, could use more subtopics.
 
Fair section headings, indicative that the paper has “flow”. Topics and subtopics not clearly indicated. Unclear organization of thoughts.
 
Disorganized appearance.
Relevant topics missing or incorrect, paper has no indicative “flow”.
Not professional.

Abstract
 
Highly informative, complete and easy to understand. Appropriate vocabulary is used.
Abstract makes you want to read the paper.
Informative, complete and understandable. Appropriate vocabulary is used.
Somewhat informative and understandable.
 
Not very informative or understandable.
 

Structure
 
Thesis is clear, easy to find, and appropriate to the assignment.
Thesis is supported by the rest of the paper.
Paper contains a “roadmap” for the reader.
There is a logical “flow” to the topics/arguments. Conclusion follows clearly from the arguments presented.
Thesis is clear and appropriate.   Thesis fairly well supported.
Paper is fairly well organized.
Conclusion follows from the rest of the paper.
Thesis is fairly clear.
Inconsistent support for thesis. Paper weakly organized. Conclusion is acceptable.
Thesis unclear and/or inappropriate.
Thesis not supported.
Paper is not organized. Conclusion doesn’t follow from the rest of the paper.

Research
 
The evidence comes from a wide variety of valid sources. The bibliography is complete and reflects appropriate sources.
 
The evidence comes from the minimum valid sources. The bibliography is complete.
Valid sources are inconsistently used.  The bibliography contains minor formatting errors.
 
Multiple sources cited  incorrectly.
Bibliography missing.
 

Critical
Thinki
 
ng
Arguments are pertinent to the topic.
Arguments are logical, supported with evidence. The key arguments have been made – no major points have been left out.
Arguments are
pertinent to the topic.   Arguments are fairly logical and reasonably supported.
Most key arguments have been made.
Arguments are not consistently pertinent, logical, or supported. Few key arguments have been made.
Arguments not pertinent. Arguments rarely, if at
all, logical and supported.
Almost no key arguments have been made.