Objectives

To observe how crystals are formed

Materials

• Black construction paper
• Plastic lid or lid from a large jar
• Measuring cup
• Epsom salt
• Tablespoon
• Wooden craft stick

Procedure

Place the circle of black construction paper inside the plastic lid. Fill the measuring cup with one-fourth cup of water and add three tablespoons of Epsom salt to the water. Stir the mixture. Pour a very thin layer of the solution into the lid. Allow it to sit undisturbed for one day.

Conclusion

Crystals form on the black paper. The Epsom salt molecules grow closer together as the water slowly evaporates. The salt molecules begin to line up in a pattern and form long crystals. The salt molecules stack together and determine the shape of the crystal.