There Are More Than _____ Federally Recognized Native American Tribes

question 27

Multiple Choice

There are more than _____ federally recognized Native American tribes in the U.S.

• A)200
• B)330
• C)425
• D)500

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Definitions:

Sleep Spindles

Brief bursts of brain activity, characterized by rapid rhythms, that occur during stage 2 of non-REM sleep and are associated with learning and memory consolidation.

EEG

Electroencephalogram, a test that measures the electrical activity of the brain and is used in the diagnosis and treatment of neurological conditions.

Alpha Waves

Brain waves that indicate a state of relaxation or light sleep.

Beta Waves

Smaller and faster brain waves, typically indicating mental activity.