Some objects float in water and other sink. But did you know that you can change whether something floats or sinks by adding a substance to the water? Let's try it and see! Pour water into a cup until ...

Sinking is when something drops beneath the surface of the water and falls to the bottom, like a stone. Can you think of some other things that float and sink? Join Kit and Pup to find out more ...

If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float. Density is a characteristic property of a substance and doesn’t depend on the ...

Normally, this algae grows in clumps on solid surfaces or forms long hair-like filaments, but as the direct result of underwater water ... why do they float in the daytime and sink at night?