Students will also be able to explain that substances dissolve by different amounts because of the molecules they are made from. For a dissolving test to be fair, the same amount of each substance ...

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 ...

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 ...

Experts say anyone who drinks water used to filter marijuana smoke will ingest ash, tar and bacteria — but won't become high.

To compare the dissolving of different substances, they need to be tested in the same way. Students develop a test to compare how the candy coating from an M&M and a Skittle dissolve in water.