Interpretation: The correct description that identifies mushroom pizza as a compound, element, heterogeneous, or homogeneous mixture should be determined.
Concept Introduction: The simplest form of matter consisting unique set of properties is said to be elements. They are pure substances made up of only one type of atom.
The chemical combination of two or more elements in a fixed proportion results in the formation of a compound.
A mixture is said to be homogeneous when its composition is uniform throughout whereas a mixture is said to be heterogeneous when its composition is not uniform throughout.

Answer to Problem 9STP
Heterogeneous mixture.
Explanation of Solution
There are various layers of ingredients in a pizza so, the composition of the entire mushroom pizza is not uniform throughout thus, it is said to be a heterogeneous mixture.
Chapter 2 Solutions
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