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 ...

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 ...

The Thermavault refrigeration unit can keep vaccines cool with a reusable salt solution. The teens who built it plan to test ...

Because salt molecules dissolve in water, the charged ions that make up the salt molecules break apart, taking up heat from ...

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 ...

"There is no hard and fast rule as to the appropriate concentration for salt water gargles, but I recommend dissolving 1/2 teaspoon of salt in 1 cup (or 8 oz) of warm water." Some people choose to ...

Three teens built a salt-powered fridge to help bring vaccines and medical supplies to rural areas. The invention uses salts that pull heat from their environments when they dissolve in water.