Earth And Life Science Practice Test

Composed of a repeating structural unit composed of atoms of one or more elements

Crystals Minerals Lattices Molecules

Correct Answer:

Crystals

Explanation:

Crystals are solids where atoms are arranged in a highly ordered, repeating pattern. The smallest repeating block in this arrangement, the unit cell, can contain atoms from one or more elements, and these units stack in three dimensions to form the crystal lattice. This long-range, periodic order is what defines a crystal and distinguishes it from random or non-repetitive structures. While minerals are natural substances with a crystalline structure, the description focuses on the repeating building block of a crystal itself, not just any mineral or other types of matter.

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