Cactus growing from a rock.
Cactus in the Petrified Forest in Arizona growing from a large piece of petrified wood.Photo by Kathy Payne
On a trip in the desert, we found this large piece of petrified wood that has cactus growing from it.
What do you think the word petrified means?
Let's look at the picture. The petrified wood used to be a large tree. Now it is made of rocks and minerals.
What could have happened to the tree that it would become rocks but still resemble the tree it had once been?
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