Density is a measure of how heavy something is compared to its size. 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 ...

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 ...

Participants played a sink-or-float game on the computer during the study. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by ...

If you could somehow keep increasing the density of the block, it would sink lower and lower into the water. When its density increased enough to displace an amount of water whose weight was equal ...

In a new paper, researchers at North Carolina State University show proof of concept for a system that—in a single ...

Did you ever wonder why hot air balloons float? You may already have some ideas. Think about them and then choose one of the options below that seems closest to why you think balloons float.