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 ...

If you've been sick lately — and, between skyrocketing flu activity, COVID-19, RSV and the plain old common cold, you ...

Students first use a dissolving test to see how salt and sugar dissolve in water. Students then run the same dissolving test on substances A, B, and C; identify the salt and sugar; and conclude that ...

Heat can help some substances dissolve faster in water. Salt, for example, will dissolve quicker in hot water than in cold water. When a substance dissolves, it might look like it has disappeared ...