Gyllene snittet och Fibonaccis talföljd
The purpose of this investigation was to find out more about students? spontaneous ideas about properties and transformations of matter. Examples of matter chosen are such which students know about from everyday life and focus is mainly on the questions if students know that all matter has weight and that matter is preserved in transformations.The method used is semi structured qualitative interviews with individual students. Different experiments were carried out together with the students who afterwards were interviewed. However, the students show varying answers and no generalizations can be done. However, when their conclusions from observations differ from their earlier experiences they trust their eyes. All students know that a human body has weight as well as a grain of dust. They also know that with addition of a colored substance in the water, the mass increases, but more hesitation exists when the additive is sugar. A couple of students are capable of discussing logically sometimes but not at all events.