In the following table, tick whether each of the substances listed is a mixture or a pure substance. If it is a mixture, also say whether it is a homogeneous or heterogeneous mixture.
Substance | Mixture or pure | Homogeneous or heterogeneous mixture |
fizzy colddrink | ||
steel | ||
oxygen | ||
iron filings | ||
smoke | ||
limestone (\(\text{CaCO}_{3}\)) |