Dissolving

Explain that dissolved salt is still there, and can be recovered.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 47

When salt dissolves, it seems to vanish. But it has only spread through the water in pieces too small to see.
Here's the evidence. Weigh the water and the salt, then mix them. The total stays the same.
Try it with a grown-up: leave a dish of salt water in a sunny spot. When the water evaporates, salt is left behind.
Stirring, warmer water, and smaller pieces all help things dissolve faster.

Georgia Standards of Excellence in Science:

S5P1.a — Plan and carry out investigations of physical changes by manipulating, separating and mixing dry and liquid materials.