Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to make flash freeze liquid [title] Gather your materials. [step] This substitute is made by combining dry ice and ethanol. For our purposes we will use 99% isopropyl alcohol or rubbing alcohol.

Ending1: You will also need a plastic 2-liter bottle, a plastic 18 oz bottle, dry ice, and scissors. [substeps] Dry ice pellets are easier to use than a block of dry ice. Ending2: We also wish to check that none of the ingredients are unflavoured. [title] Pour out all the water; the heat will trigger electricity. Ending3: [substeps] This substitute is suitable for children without cell phones. ( only 99% of the liquid requires a cell phone. Ending4: For our culinary use, we will use 8 oz. ( 240 ml) of vodka and 45 ml (7 fl.

Answer format: ending1/ending2/ending3/ending4