Is pie crust a pure substance?

Pie crust is definitely not a pure substance. Here's why:

* Multiple Components: Pie crust is made up of several different ingredients, including flour, butter, water, and often salt and sugar.

* Variable Composition: Even within a single recipe, the proportions of these ingredients can vary, leading to slight variations in the final crust.

* Heterogeneous Mixture: Pie crust is a mixture because the different ingredients remain distinct, even when combined. You can visually see the flour particles, the butter, and the water.

Pure substances are made up of only one type of atom or molecule. Examples include water (H₂O) or pure gold.

Pie crust is a delicious and complex mixture, not a pure substance!