Hooked on Science: Egg geode

Materials

• 12 eggs
• Water
• Borax
• Food coloring

Instructions

• STEP 1: Crack each egg near the narrow end. Remove the shell near the top of each egg, pour out the contents and place the eggs back into the carton, so the cracked part of the egg is facing up.
• STEP 2: Fill the saucepan 3/4 of the way with water and add food coloring and mix.
• STEP 3: Add borax until the water is supersaturated with it.
• STEP 4: Once the water starts boiling, pour the contents into each egg, allow the water to evaporate, and observe. Was this process quick or slow compared to events that occur on Earth? Use several sources to provide evidence Earth events can occur quickly or slowly.

Explanation

As the water evaporates from the eggs, Borax crystals deposit on the inside of the eggs, creating an egg geode.