Which of the following does is NOT a benefit of the atmosphere? A
Gives us oxygen and other gases.
B.
Gives us liquid water.
с.
Protects us from the sun's radiation.
D.
Makes it cold for us.

Salad dressing is an example of a heterogeneous mixture. The reason it is heterogeneous is because not everything is perfectly mixed in together. In most salad dressings, there are chunks or particles that you can visibly see and separate. For the mixture to be considered homogeneous, everything would have to be combined smoothly, you wouldn't be able to see any chunks, and nothing would have been able to be separated, at least by physical means.