This document discusses mixtures and solutions. It defines a mixture as a combination of two or more substances like a tossed salad, while a solution is formed when one or more substances dissolve in another substance like sugar dissolving in water. Solubility is the ability of a substance to dissolve in another. The document suggests two ways to increase solubility - raising the temperature of the solvent or crushing the solute being dissolved. It also describes an experiment comparing how quickly a sugar cube, broken sugar pieces, and sand dissolve in hot versus cold water.

1. Lesson 3
How do substances mix?

2. Activity-Separating a Mixture
• Beads-Pick them out with
my hands
• Marbles-
• Paper clips-
• Pennies-
• `

3. mixture
• combination of 2 or more
substances
• examples:
• tossed salad
• frozen mixed vegetables

4. solution
• 1 or more substances- dissolved in
another substance
• solute= substance that is dissolved
• solvent= substance that dissolves the
other substance

5. solubility
• measure of ability of 1 substance
to dissolve in another
• ways to speed up process of
dissolving solute:
1. raise temp. of solvent
2. crush solute

6. solubility experiment
Hot water
+ sugar
cube
Sugar
cube +
cold
water
Broken
sugar
cube +
cold
water
Sand +
cold
water

7. solubility experiment
Hot water
+ sugar
cube
Sugar
cube +
cold
water
Broken
sugar
cube +
cold
water
Sand +
cold
water