What’s the difference between a compound and a mixture?

Answer	A compound is chemically bonded in a fixed ratio and needs a chemical process to separate. A mixture is a physical blend and can often be separated mechanically (like filtering or draining). WHY IT MATTERS: This matters for contamination: sometimes you can separate it; sometimes you can’t without chemistry. AIRCRAFT EXAMPLE: Water in fuel is a mixture you can separate; water itself is a compound you can’t mechanically split into elements. MEMORY AID: Compound = bonded; mixture = blended. EASA TIP: EASA often asks which can be separated by mechanical means (mixtures).
Difficulty	Medium
Lesson	2.1.1 Nature of Matter
Module	Module 2.1
Tags	CompoundsMediumMixturesModule 2.1