This Planet Really Rocks
The Stone-Faced Boy
by Paula Fox
This is a book that everyone will enjoy reading.
In this book, Aunt Hattie gives Gus Oliver a geode, a rock with crystals
The creation of geodes occurred millions of years ago.
Their existence started as a bubble of gas inside the volcanic layers
of the earth's crust. Water inside these bubbles evaporated over time,
leaving behind the minerals which eventually formed into crystals.
Every geode is different; no two are alike. Opening a geode is like
treasure chest filled with beautiful crystals.
After reading this book, you will want to follow the directions below to
create your own geode.
- hot plate
- mineral salts
- eggshell halves
- beaker tongs
- large beaker (heatproof)
- small beaker (heatproof)
- egg carton
- Prepare your eggshells by using tweezers and removing the inside
the eggshell. (Do this very carefuly so as to not crack the shell.)
- Place a large beaker of water on the hot plate and heat the water
until it is hot.
(The water does not need to boil).
REMEMBER TO WEAR YOUR GOGGLES!
- Using the beaker tongs, pour about 100 ml of hot water into a
- Pour mineral salts into the hot water and stir until no more will
This will give you a saturated solution of mineral salts.
- Pour this saturated solution into the clean eggshell. Fill each
3/4 full of the solution.
- Place the eggshell in an empty egg carton and place it where it will
disturbed until the water has evaporated.
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Observe the eggshell each day and record what you see.
- Explain how this geode resembles a real geode
- Tell what part of the geode that the eggshell represents.
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