Make your best guess, then put it to the test. The temperature at which a liquid turns into a solid is called its freezing point.
Different liquids have different freezing points.
Also, dissolving a substance in a liquid affects its freezing point, making it lower. In this project, you will investigate the freezing points of several liquids. Fill to the mark with one test liquid. Set the glass container in the bowl or can. Insert the thermometer vertically into the test liquid.