This will be a fun and educational Halloween science presentation that will excite any ghost or goblin!
I will be demonstrating an enormous amount of spooky fog, crushing flowers, making ghosts, and creating bloody hands!
Materials in our environment undergo phase changes of liquids, solids, and gases. One material I'll be demonstrating is liquid nitrogen that boils at an incredibly low temperature of -321 degrees Fahrenheit (-196 degrees Celsius). When this material boils it cools water in the atmosphere and creates an amazing amount of Halloween fog. Liquid nitrogen can also be utilized to freeze materials very quickly, such as water contained in flowers making them possible to crush quickly and destroying anything beautiful for this Halloween!
And every Halloween scientist will find my acid/base indicator wash useful for making bloody hands. This material is called phenolphthalein, a laxative once used in Ex-Lax. When phenolphthalein is put into a basic environment it turns redish-pink.