Category: Geology
a tree is a perennial plant with an elongated stem, or trunk, supporting branches and leaves in most species. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. Trees tend to be long-lived, some reaching several thousand years old. Trees have been in existence for 370 million years.
Sand is a granular material composed of finely divided rock and mineral particles. It is defined by size.
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