1. A Sigma Science Presentation Do all things dissolve? 6C More About Dissolving

2. DISSOLVING In a solid the particles find it difficult to move, that’s why solids are rigid. In a gas the particles move the most and can continually spread if they are allowed to. In a liquid the particles can move and flow. This is why liquids run. Everything around us is made of particles.

3. This process does not happen when any solid or liquid meet (your glass does not dissolve when you put water in it), only when the right solid meets the right liquid. In the right conditions, when solid particles meet liquid particles, they can mix together to form a special mixture called a solution. This process is called dissolving. When they do dissolve, the solid part is called the solute and the liquid it dissolves in is called the solvent.

4. Which of the following do you think will dissolve in water? Sugar Curry PowderIron Filings Salt Wood Shavings Coffee Powder Rice Sand Discuss and record your predictions. Design an investigation to test your predictions.