Examlex
Examples of valuable nonmetallic minerals extracted by mining are ____________
Sleep Spindles
Burst of brain activity observable in an electroencephalogram (EEG) that occurs during stage 2 of sleep, associated with memory consolidation.
Stage 2 Sleep
The second phase in the sleep cycle, characterized by a deeper level of sleep than stage 1, with the presence of sleep spindles and K-complexes in the brain waves.
Defining Characteristic
A unique attribute or feature that establishes the distinct nature of something or someone.
Growth
The process of increasing in size, maturity, or complexity, often associated with physical, emotional, or intellectual development.
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