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Transcript of Egg Geodes
Blown out egg
How much alum do we need to make an egg geode?
If we increase the regular amount of alum (25ml), then the egg geodes will grow bigger because the alum (a salt) will dry out the eggshell to create bacteria for the crystals.
Step 1: Take three eggs and drain the yolks.
Step 2: Dry eggs and cut them in half with scissors.
Step 3: Take small paintbrush and paint edges with glue.
Step 4: Make three bowls of growing solution, one with 15 ml of alum, one with 25ml of alum, and one with 50ml of alum. All must have 1 cup of boiling water and 20 drops of food coloring.
Step 5: Place one half of the egg into each bowl.
Step 6: Wait overnight (or how many days it might take) till the crystals grow big.
Step 7: When ready, take eggs out of solution and place somewhere to dry.
Are hypothesis was correct because the blue egg (50ml) had the most crystals.
We compared 3 different egg shells that had different amounts of alum, One egg shell contained 50 ml of alum and the other two egg shells contained 15ml and 25ml of alum.
We could have measured something wrong or have different temperatures of water.
If we were to conduct this experiment again, we would be more accurate on measuring everything and we would have blown out the egg.
By: Rachael Valeria and Michaela Suess
Geode-Hollow stone with crystals and minerals that have grown inside. They are chemically formed.
Geodes are found within lava flow. They go through lava rock and become crystallized.
Some geodes are made of agate and quartz.
Alum is a chemical compound and it is a salt.
Spotlights (book) Rock and Minerals, Oxford University
Eyewitness (book) Crystals and Gems, Alfred Knopf
A Look at Rocks (book), Jo Kittinger