Scientists find nitrogen near salt in asteroid sand
Scientists in Japan have found chemicals with nitrogen in sand from the asteroid Ryugu. The chemicals were gathered around small crystals of salt.
How things dissolve
Science
Grade 5
When something dissolves in water and disappears from sight, the water and the dissolved material together still weigh the same. An electronic scale shows this. Water with something dissolved in it is called a solution, and there is a limit to how much will dissolve. Comparing salt with alum shows that the amount depends on the temperature of the water, the amount of water, and the material itself: more water dissolves more of both, but warming the water dissolves much more alum while salt hardly changes. You can put the results in a table or a graph. If you let the water evaporate or cool the solution, the dissolved material comes back out as neatly shaped crystals.