Thames & Kosmos Wow in the World: Break-Open Crystal Geodes handleiding
Handleiding
Je bekijkt pagina 6 van 12
What’s going
on her?
INVESTIGATING YOUR GEODES
Examine your opened geodes
with the magnifying glass
under bright lighting. What
do you see? Record your
observations on page 8.
A geode is a
rock formation with crystals inside
.
A crystal is a special kind of rock that has a
neat and organized structure of tiny particles
called molecules. It can be transparent or shiny.
Some crystals, like the sparkly gemstones you
might have seen, are really beautiful and come in
different shapes.
Geodes are usually formed in
volcanic rock.
As
the lava ow cools,
gas bules
form, which can
create cavities with diameters ranging from a few
centimeters to several meters.
Water
containing
lots of
minerals
then seeps into these cavities and
crystaizes
over time. The crystal-lled bubbles
become geodes.
Geodes can be made of
many dierent types
of minerals
and can have different
impurities,
resulting in many different colors. Clear
quartz and purple amethyst
geodes are common. See
page 9 for examples of
different geodes.
“Every geode
is unique”
3
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QUARTZ GEODE
4
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Productinformatie
| Merk | Thames & Kosmos |
| Model | Wow in the World: Break-Open Crystal Geodes |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 7049 MB |
