Almost everything is made of particles. Particles can be atoms, molecules or ions. Particles behave differently in solids, liquids and gases. The particle model explains the differences between solids ...

The table below shows a comparison of the same substance in three different states. A single particle does not have the properties of the material it is part of. The properties of a substance are the ...

From the crest of a wave in the sea to the surface of a glass of water, there are always small fluctuations in density at the point where the air comes in contact with a liquid. Until now, it was ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Glass and other strange materials have long confounded textbook definitions of what it means to be solid. Now, two groups of physicists propose a new solution to the riddle. The answer seems simple ...

Atoms, those tiny constituents of matter, are invisible to the naked eye, but their interactions shape our reality. However, the notion of "contact" between them is much more complex than it seems.