Question

Choose the answer that best describes what kind of substance air is. heterogeneous mixture homogeneous mixture

Answer 1

Air is a homogeneous mixture.
Heterogeneous mixture means that the components are not evenly distributed, just like a mixture of sand and water where we can identify the individual components visually.

Answer 2

The correct answer is homogeneous mixture.

The difference between a homogeneous and a heterogeneous mixtures is that in the former, you cannot identify individual components that make up the mixture, and in the latter you can. So, air is a homogeneous mixture because it is uniform even though it contains various elements, such as nitrogen, oxygen, etc.

An example of a heterogeneous mixture would be salt and oil, or sand and water.