Tug of War

1. A student stirs one teaspoon of sugar into a glass of hot coffee until the sugar can no longer be seen.

2. A cook pours vegetable oil into a bowl of vinegar and leaves it undisturbed for five minutes.

3. A laboratory technician adds a small amount of iodine crystals to rubbing alcohol, producing a uniform brown mixture.

4. A child mixes chalk powder with water and notices that the white particles settle at the bottom after a few minutes.

5. A pharmacist dissolves oral rehydration salts (ORS) in the recommended amount of clean water before giving it to a patient.