As it was said, scientific investigation produces as one of its most recognisable
outcomes some highly structured propositions about the world, but a prominent
feature of science is that it always requires reasons to sustain those propositions.
During investigation, scientists produce or obtain ‘compelling’ elements in favour
of our understanding of reality. In the NOS proposal presented here, school
scientific investigation is portrayed as the collection, structuring and use of evidence
in order to support a scientific view on a natural phenomenon