Obsidian Exhibits a ________ Texture

question 99

Multiple Choice

Obsidian exhibits a ________ texture.

• A)fine-grained
• B)glassy
• C)coarse-grained
• D)porphyritic

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Definitions:

Placebos

Inactive substances or treatments used as a control in experiments, often to test the effectiveness of medical drugs.

GABA

Gamma-aminobutyric acid, an inhibitory neurotransmitter in the brain that helps reduce neuronal excitability throughout the nervous system.

Alcohol

A psychoactive substance found in drinks such as beer, wine, and spirits, capable of altering mood, behavior, and cognitive functioning.

Tranquilizers

Medications used to reduce tension or anxiety, often by depressing nerve function or inducing sedation.