Everyday examples of melting and dissolving things

📚 Quick Study Guide

• 🔥 Melting: The process where a solid changes into a liquid due to an increase in temperature. The substance reaches its melting point. For example, ice turning into water.
• 🧊 Melting Point: The temperature at which a substance changes from solid to liquid. For example, the melting point of ice is $0^{\circ}C$ or $32^{\circ}F$.
• 💧 Dissolving: The process where a solute (like sugar) disperses evenly into a solvent (like water) to form a solution.
• 🧪 Solute: The substance that dissolves (e.g., sugar, salt).
• 🌊 Solvent: The substance that does the dissolving (e.g., water).
• ☕ Solution: The homogeneous mixture formed when a solute dissolves in a solvent (e.g., sugar water).
• 💡 Factors Affecting Dissolving: Temperature, stirring, and the size of solute particles can affect how quickly something dissolves.

🧪 Practice Quiz

1. Which of the following is an example of melting?
   1. A. Sugar dissolving in water
   2. B. Ice cream turning to liquid on a hot day
   3. C. Salt dissolving in soup
   4. D. Sand settling at the bottom of a glass of water
2. What is the name of the process when salt disappears in water?
   1. A. Melting
   2. B. Freezing
   3. C. Dissolving
   4. D. Boiling
3. What is the 'solute' in a saltwater solution?
   1. A. Water
   2. B. Salt
   3. C. The glass
   4. D. Nothing
4. Which of these actions will likely NOT speed up the dissolving of sugar in water?
   1. A. Heating the water
   2. B. Stirring the water
   3. C. Using sugar cubes instead of granulated sugar
   4. D. Crushing the sugar cubes into powder
5. The melting point of a certain metal is $1000^{\circ}C$. What does this mean?
   1. A. The metal dissolves in water at $1000^{\circ}C$.
   2. B. The metal changes from liquid to gas at $1000^{\circ}C$.
   3. C. The metal changes from solid to liquid at $1000^{\circ}C$.
   4. D. The metal freezes at $1000^{\circ}C$.
6. Which is an example of dissolving that doesn't involve water?
   1. A. Sugar in coffee
   2. B. Carbon dioxide in soda
   3. C. Gold dissolving in mercury to form an amalgam
   4. D. Salt in soup
7. What happens to the particles of a solute when it dissolves in a solvent?
   1. A. They disappear completely.
   2. B. They clump together.
   3. C. They spread evenly throughout the solvent.
   4. D. They sink to the bottom.