A mixture is a combination of substances mixed without a chemical reaction, retaining their original properties. Examples include cereal mix, cookie dough, and air.
These have uniform composition throughout with indistinguishable parts, like air, saline solution, and alloys (e.g., steel).
These are non-uniform with visible distinguishable parts, such as sand and water, oil and water, and chocolate chip cookies.
Solutions
Homogeneous mixtures where solute particles are completely dissolved in the solvent, such as sugar in water, making the mixture clear and light cannot scatter.
Suspensions are heterogeneous with visible particles that scatter light and settle over time (e.g., chalk in water). Colloids have intermediate properties with particles that scatter light but do not settle (e.g., milk, ink).
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