Final answer:
Wine can contain insoluble materials such as colored crystals and can become oxidized if exposed to air for a long time.
Step-by-step explanation:
Wine has two main effects: it can contain insoluble materials such as colored crystals and it can become oxidized if exposed to air for a long time. Insoluble materials in wine can often be seen as crusts on the bottle or suspended in the liquid wine itself. These materials can include colored crystals that may be found on the cork or encrusting the bottle.
As for oxidation, wine that has been exposed to air for a long time can develop an unpleasant vinegary taste due to the production of acetic acid.