Automatic indent on text wrap whenever it do not fit one line

The description environment might come in handy:

To customize indentation, spacing, ... take a look at the enumitem package.

documentclass{article}
usepackage{lipsum} % Just used for dummy text via the lipsum command. Do not use in real document.
begin{document}

lipsum[4]

begin{description}
item[Nominal scale] lipsum[5]
end{description}

lipsum[4]
end{document}