Start Searching the Answers
The Internet has many places to ask questions about anything imaginable and find past answers on almost everything.
The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
Can mass alone be used to accurately predict whether an object will sink or float? -No, you need both mass and volume to determine its desity to see if it can float. -No, you need both mass and volume to find its density to see if it can float.
The density of a liquid determines whether it will float on or sink in another liquid. A liquid will float if it is less dense than the liquid it is placed in. A liquid will sink if it is more dense than the liquid it is placed in.
may think an object sinks or floats because an object is heavy or light. But not all heavy objects sink, and not all light objects float. For example, large ships are very heavy but they float. Also, a pound of feathers will float and a pound of bricks will sink.
A feather floats in water because it’s density is less than that of the water .
The horn comb is denser than water, so it will sink if put in water. It means if the comb float, it must not a horn comb. But if it sinks, you cannot tell whether it is genuine or fake for now.
A bin or sink filled with water, various household objects including ones that float (feather, Lego, bath toy, crayon, ping pong ball, plastic utensil, pencil, etc.) and ones that don’t float (toy cars, coins, metal spoon, eraser, dry pasta, pipe cleaner, etc.), towel.
A thin, inflatable object like a rubber raft is an ideal way to trap air for floatation. Styrofoam works well too because consists mostly of trapped air. It may not be very strong however (and the rubber raft may have strength or stability issues as well). Balsa wood is also mostly trapped air.
Fill a bowl with water and place it on a tray because splashing will happen. Find a bunch of small waterproof toys of varying weights and materials. Have your preschooler toss the objects into the water one at a time, trying to guess if they will sink or float before they hit the water.