Student corrected

A minority of students correctly predicted four products in the ratio 3 4 4 1 (Fig. 1.5). 

Go through the entire test and answer all the easy questions first. Generally, the first 25 or so questions are considered by most to be the easiest questions, with the level of difficulty increasing as you move through Section I. Most students correctly answer approximately 60% of the first 25 multiple-choice questions, 50% of the next 25 questions, and only 30% of the last 25 questions (the fact that most students do not have time to finish the multiple-choice questions is factored into the percentages). 

A SURVEY OF MINIMAL SURFACES, Robert Osserman. Up-to-date, in-depth discussion of the field for advanced students. Corrected and enlarged edition covers new developments. Includes numerous problems. 192pp. 53 x 83. 

Are they supporting their predictions with actual test data (Remember, it is not important that students correctly predict the identity of the unknowns but that they provide plausible reasons to support their predictions.)... 

Are students correctly using new vocabulary and descriptive language ... 

Remember that the above criteria, not whether the student correctly determines the mixture s composition, are most important when evaluating record sheets. Figure A-l illustrates the variety of responses you may expect. 

A mere tenth of the questioned students correctly recognized that nothing changes in the equilibrium, because the same 0.5 molar solutions are added, i.e. the same concentration of particles are available in both solutions and no changes in concentration can be found. 

Regarding the question, what do you understand by the term acid or base , many students respond with a pH value ( acids have a small pH value ) or with simple, but misconceived phenomena, which are formulated as follows Adds eat away, are dangerous, yellow, red or acidic [4], Other statements describe acid concepts, which have been mainly learned and remembered Approximately 15% of the answers show the Arrhenius concept (acids contain H + ions) approximately 30% show the Broensted concept (acids release protons), whereby it is not certain if students correctly understand the notion of acids as acid particles. 

Dr. Kim S. Tree was preparing a manuscript for publication in which she reported that the pi of the tripeptide Lys-Lys-Lys was 10.6. One of her students pointed out that there must be an error in her calculations because the pA of the e-amino group of lysine is 10.8 and the pi of the tripeptide has to be greater than any of its individual pA a values. Was the student correct ... 

Novick Nussbam (16) conducted a cross-age stucfy in early work on the topic to show that students hold misconceptions about nature and behavior of particles. They found that many misconceptions are not overcome widi age. For example, over 60% of high school and university students did not picture empty space between gas particles, and more than 50% of these students did not show uniform distribution of gas particles in a closed flask. In addition, less than 50% of these students correctly indicated that the uniform particle distribution was due to constant particle motion. The study recommended that instructors should be aware of such misconceptions by solicting students ideas concerning chemistry concepts and should use this knowledge to prepare curriculum materials. At this point, it was not known exactly what one could use to combat these misconceptions dealing with phenomena that could not be seen. 

In the example described above (d), the null hypotheses would be (1) Viewing the animation had no effect on the number of students correctly predicting that the can would collapse when cooled, (2) Viewing the animation had no effect on the number of students blindly quoting the ideal gas laws, and (3) Viewing the animation had no effect on the number of students mentioning important concepts like water vapor condensation or a decreased inner pressure. 

When asked what causes electrolyte solutions to conduct electricity, a student responds that it is due to the movement of electrons through the solution. Is the student correct If not, what is the correct response ... 

---