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Is concrete a pure substance, homogeneous mixture, or heterogeneous mixture?

This is for my CP Chemistry homework. I would use my book but my teacher used a worksheet that it from a different text book then the one we use and so it is harder to answer the worksheet's questions. I have already looked for the answer. I'm thinking homogeneous mixture.

I have found out it is a heterogeneous mixture.


Concrete is a mixture of cement, water, chemicals, sand and often gravel.
Homogeneous mixtures are mixtures of materials that are alike in size and form.
Heterogeneous mixtures are mixtures of materials that are different in sizes or forms.
You decide.


I never did like chemistry much. But my curiosity led me to Wikipedia. Which only confused me more. Maybe you can make heads or tails of what it says there.......
In physical chemistry, homogeneous describes a single-phase system as opposed to a Heterogeneous system. Homogenization is intensive mixing of mutually insoluble phases (sometimes with addition of surfactants) to obtain a soluble suspension or emulsion, for example homogenizing milk so that the cream doesn't separate out.
Heterogeneous mixtures are mixtures with non-uniform composition. The parts of a heterogeneous composition can be mechanically separated from each other. Examples include salad, trail mix, sand, salt mixed with sand, and soil.


okay now i'm thinking Heterogenous...
Main Entry: heterogeneous mixture
Part of Speech: n
Definition: any combination of substances that does not have uniform composition and properties; a mixture of physically distinct substances with different properties


Homogeneous is right.


I ask my husband He is a civil Engineer.


Well, my teacher told us it is a heterogeneous mixture.

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