Completion/Neatness
______/4 / All required elements are complete and very detailed. Report is extremely neat and easy to read. / All required elements are complete. Report is neat. / Elements are somewhat complete but not detailed. Report is somewhat neat. / Several required elements are missing. Report is messy.
Drawings/Diagrams
______/4 / Clear, accurate diagrams are included. Diagrams are labeled neatly and accurately, following all guidelines for lab drawings. / Diagrams are included and are labeled neatly and somewhat accurately, following most guidelines for lab drawings. / Diagrams are included, but follow few guidelines for lab drawings. / Diagrams are missing OR do not follow guidelines for lab drawings.
Understanding of Scientific Concepts
(worth double points)
______/8 / Report illustrates an accurate and thorough understanding of scientific concepts underlying the lab. Questions are answered thoroughly and with details or examples from the lab. / Report illustrates an accurate understanding of most scientific concepts underlying the lab. Questions are answered with some details or examples from the lab. / Report illustrates a limited understanding of scientific concepts underlying the lab. Questions are answered with few details or examples from the lab. / Report illustrates inaccurate understanding of scientific concepts underlying the lab OR shows little effort and reflection.
Saugus High School Lab Conclusion
______/15 / (Use grading rubric for the conclusion statement to determine score.)
Saugus Science Writing Guidelines
______/4 / One or fewer errors in spelling, punctuation and grammar in the report. All answers are in complete sentences. / Two or three errors in spelling, punctuation and grammar in the report. Most answers are in complete sentences. / Four errors in spelling, punctuation and grammar in the report. A few answers are in complete sentences. / More than 4 errors in spelling, punctuation and grammar in the report. Incomplete sentences.
Experiment 7B: Dialysis (Diffusion)
Online Demonstration
Website:
http://www.bozemanscience.com/diffusion-demo
Click on the video to play & pause as you listen and answer the lab questions. It looks like this:
Purpose: To demonstrate that some substances diffuse through membranes, while others do not.
While watching, answer the following questions.
1. What is diffusion?
2. Glucose is a ______saccharide. It’s chemical formula is: ______
3. Starch is a ______saccharide. Draw a starch molecule.
4. Draw a water molecule.
5. When iodine (from the IKI, or Lugol’s solution) is mixed with starch, what happens?
6. Draw and label the experimental set-up of the beaker and dialysis tubing. Label the location of the starch and iodine. Color the diagram.
7. Draw and label the experimental results. Label the location of the starch and iodine. Color the diagram.
Analysis Questions:
1. To your “after” picture, add arrows showing the direction that substances moved.
2. Describe the starch solution inside the tubing before and after the experiment.
3. Describe the iodine solution in the beaker before and after the experiment.
4. How are we able to tell if starch and iodine are present together?
5. What substance was able to move through the membrane? How do you know?
6. What substance did NOT move through the membrane? How do you know?
7. What is a selectively permeable membrane? Explain your definition using data from this experiment.
Saugus High School Lab Conclusion (modified)
Write a paragraph to summarize the concepts from this video, following the Science Writing Guidelines.
1. What was the purpose of this demonstration? ______
2. What was done in this experiment? What were the results? Explain what happened in the demonstration; be sure to use the following vocabulary words: concentration gradient, semi-permeable membrane, iodine, starch, diffusion
______
3. Where is this lab or scientific concept found in your textbook or other reference material? Quote the passage, then cite with page #, title and author. Do the results of your lab confirm or refute the reference material? Explain. ______
4. Write one sentence that wraps up the lab using facts and data. Remember, no opinions or feelings. ______
Science Lab Conclusion Rubric
4 / 3 / 2 / 1 / 01. Introductory Statement / Clear, concise statement of the purpose or problem, and hypothesis / Unclear, or partially complete statement / Missing or did not follow directions.
2. Summary / All stages of the lab are clearly summarized. / All stages of the lab are discussed, but somewhat unclear or too short. / Missing one stage of the lab in the summary. / Missing multiple stages of the lab in the summary and/or summary is very unclear. / Missing or did not follow directions.
3. Textbook or Other Material Reference / Accurate reference with all required information. Clear explanation of confirmation or rebuttal of scientific information in reference material. / Accurate reference, but explanation of reference material is somewhat unclear, too short or slightly flawed. / Minimal explanation or some missing information. / Inaccurate reference and/or some missing information and/or unclear explanation. / Missing or did not follow directions.
4. Concluding Statement / Clear and concise statement with facts and data. / Statement is unclear or lacking facts and data. / Missing or did not follow directions.
5. Content-Specific Scientific Vocabulary / All required vocabulary is used to enhance explanation of science concepts. / Some of the required vocabulary is used to explain the science concepts. / Few or none of the required vocabulary is used; vocabulary is used incorrectly.
6. MLA Citation / Proper MLA Citation is present / Missing or did not follow directions.
Total ______/15