What is used to agitate liquids or mixtures?

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Multiple Choice

What is used to agitate liquids or mixtures?

Explanation:
Agitation means actively moving the liquid to promote mixing and dissolution. The stirring rod is a slender bar used to stir or swirl liquids by hand, creating flow and bringing solutes into contact with solvent so solids dissolve and components mix evenly. That direct, hands-on action is exactly what agitation requires. The other options serve different purposes: a test tube rack holds tubes, a hot water bath heats without necessarily mixing, and a swab is for sampling or applying material, not stirring a liquid.

Agitation means actively moving the liquid to promote mixing and dissolution. The stirring rod is a slender bar used to stir or swirl liquids by hand, creating flow and bringing solutes into contact with solvent so solids dissolve and components mix evenly. That direct, hands-on action is exactly what agitation requires.

The other options serve different purposes: a test tube rack holds tubes, a hot water bath heats without necessarily mixing, and a swab is for sampling or applying material, not stirring a liquid.

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