Guide Questions: 1. What are the solid materials that can be completely ✓ dissolved in the liquid materials? 2. Why do these materials completely dissolve in liquid? 3. What are the solid materials that cannot be completely dissolved in the liquid materials? 4. Why do these materials cannot completely dissolve in liquid? 5. What are the different changes you observed when solid and liquid materials are mixed? 6. What happens to the solid materials when mixed with the liquid materials?​