What type of mixture is a salad?

A salad is a heterogeneous mixture.

Here's why:

* Heterogeneous mixtures have components that are not evenly distributed throughout the mixture. You can easily see the different parts of the salad, like lettuce, tomatoes, cucumbers, etc.

* Homogeneous mixtures have components that are evenly distributed, like saltwater or air.

Since you can easily distinguish the individual ingredients in a salad, it is a heterogeneous mixture.