They also create an equation for d n , make a scatterplot of their data, and graph their equation with the scatterplot. They accurately describe their results. Each partner creates a spiral following Steps 1-5 on page 413. The spiral looks natural. 3 Students work through all aspects of the project and their work is generally accurate and well done.
Some students have difficulty in actually creating their own spirals.
Their spirals do not look fully natural with a smooth curve connecting all the points. The questions following Step 5 are answered correctly. 2 Students' measurements are not as accurate as they could be. Their ratios are not representative of the shell measured. The equation they create gives calculated values for d n that are not very close to the distances measure.