Select all that apply.

which of the following are characteristics of heterogeneous mixtures?

-distinguishable components
-evenly distributed components
-particles too small to be seen with a microscope
-components in varying proportions
-particles that may settle

Distinguishable components and particles that may settle (but don't have to) are characteristics of heterogeneous mixtures.
Small particles and evenly distributed components are characteristics of homogeneous mixtures, while the proportions of the components do not affect this distinction.

Giga is the second highest prefix on the normal scale, the first is terra.