Making Things Float and Sink
Understanding the basics of density and how that affects flotation and buoyancy comes to life in a step-by-step guide that presents simple but effective experiments that include creating a hydrometer and a jet boat.
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adult to cut adult to help Ask an adult ballast balloon neck becomes less dense blow boat or ship boat shape boats and ships bottle neck bottle top bottom bowl of fresh buoy BUOYANCY Cocktail sticks cooking oil creates a cushion Cut a boat Dense liquids dense than water denser density dive EGG FLOAT fast-moving flow fill with water float and sink float on top FLOATING LIQUIDS FLOATING UNDERWATER flow of water fresh egg fresh water FURTHER IDEAS Cut FURTHER IDEAS Try hairdrier hot tap water hot water hovercraft hydrometer floats Ice floats ICE-CUBE icebergs jellyfish jet boat large container Let the paper modeling clay ocean liner oil floating paper clip Pill plastic drinking straw plastic soda bottle Plimsoll lines propeller rudder points sail salt squeeze the bottle STARBOARD steer submarine sink surface syrup THINGS FLOAT tiller top back tube vessel Watch Water Oil water shoot weight