Explores 11-year-old children's approaches to the concept of volume using 6 tasks that were developed to identify commonalities in children's responses. Results suggest that children hold and use different conceptions, in their effort to explain and compare aspects of volume, which fall in certain categories which were met in almost all the tasks.…

Describes a study of Greek high school students' (n=116) perceptions of the ozone layer. Finds that students have a good understanding of the position and purpose of the ozone layer in terms of protection from ultraviolet rays, but students also hold misconceptions linking the ozone layer to the greenhouse effect and other forms of local…