Simon has collected three samples from the coral reef where he observes marine life. He must determine whether each one is a pure substance or a mixture.

A 4-column table with 3 rows. The first column has entries sample A, sample B, sample C. The second column labeled appearance has entries clear liquid, clear blue liquid, opaque whitish liquid. The third column labeled when heated has entries evaporates completely at 70 degrees C, boils at 90 degrees Cleaving blue crystals behind, boils at 100 degrees leaving white crystals behind. The fourth column labeled when left over time has entries appearance does not change, appearance does not change, dust appears to settle at the bottom.

Sample A is a
, Sample B is a
, and Sample C is a
.