Åk 6–9

1.1 Introduction
In order to describe and show reality, we sometimes need to enlarge or reduce things.  In order to describe how much we have enlarged them or reduced them we have created the concept of scale or ratio.

You come into contact with enlargement or reductions almost everywhere.

A map is an example where we have done a reduction  of reality.

Maps can have different scales.

Foto: Fredrik Enander

A microscope magnifies reality like for example bacteria or cells.

Foto: Fredrik Enander

With a copier you can enlarge or reduce the side of pictures and text.

Foto: Fredrik Enander