It includes observations and conclusions that students are meant to make on their own. Evaporation occurs when molecules in a liquid gain enough energy that they overcome attractions from other ...

But if it is, it’s “totally new.” Normally, heat is what gets evaporation going, causing water molecules in the liquid to jostle more vigorously. That extra energy can break some of the ...

Yes, water is actually two hydrogen atoms with an oxygen atom. This is why we call it H 2 O. However, for now let's just pretend like it is a single thing. These water particles are just moving ...

says Dr. Litniewski. The hitherto model of evaporation was based on the principle of conservation of mass: the mass of molecules released from the surface of a liquid had to respectively increase ...

in which particles of light could free electrons from atoms in the material they strike. “The finding of evaporation caused by light instead of heat provides new disruptive knowledge of light ...

Students will be able to develop and explain a particle-level model to describe their observations of water dissolving salt, the water evaporating, and the salt crystals re-forming. Dissolving a solid ...