Density
The Bradley University Chemistry Club Demo Crew is grateful for support from the Illinois Heartland Section of the American Chemical Society and the Illinois Space Grant Consortium.
Which materials typically float: metals, ceramics, or polymers?
Metals vs. Ceramics vs. Polymers: Will it Float?
Comparison of density and other general properties for metals, ceramics, and polymers.
Why does the soy sauce packet sink when you squeeze the bottle?
Density and Compressibility with a Soy Sauce Packet Cartesian Diver
A soy sauce packet in a bottle of water can sink when the bottle is squeezed, compressing the air pocket in the packet and making it more dense than water. Release the bottle, and the packet rises again.
Why do oil and water not mix? How does this analogy relate to COVID-19?
Two Phase "Wave" Bottles Demonstrate Density, Polarity, and Soap
Bottles containing yellow corn oil and water with food coloring can be used to demonstrate density, polarity, and the effectiveness of soap in dispersing oily materials, including the outer layer of the COVID-19 virus.
Do you expect an 11 pound bowling ball to sink or float when dropped in a swimming pool?
11 Pound Bowling Ball Floats in a Swimming Pool
Bowling balls that are greater than 12 pounds sink in water. Bowling balls that are less than 12 pounds float in water.
Why do lava lamp blobs sink but Galileo beads sink when they are heated?
Lava Lamp vs. Galileo Thermometer: Density and Thermal Expansion
Lava lamp blobs rise and Galileo thermometer beads sink when they are heated. Why? It's all about density and thermal expansion. VIDEO CORRECTION: The liquid in the thermometer is not water
How can polystyrene and sand be separated from water?
Separation of Polystyrene and Sand Using Salt Water
Separation of a heterogeneous mixture of polystyrene and sand using salt water, which is less dense than sand and more dense than polystyrene. Microplastics are also briefly discussed.