What Do Pumice and Obsidian Have in Common

question 102

Multiple Choice

What do pumice and obsidian have in common?

• A)basaltic composition
• B)glassy texture
• C)ultramafic composition
• D)phaneritic texture

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Definitions:

Brain Activity

The functioning of the brain as it engages in various cognitive, sensory, and motor tasks, typically measured by various neuroimaging techniques.

Hormones

Chemical messengers produced by the endocrine glands that regulate various bodily functions and processes.

Neurotransmitters

Chemical messengers that transmit signals across a chemical synapse, from one neuron (nerve cell) to another 'target' neuron, muscle cell, or gland cell.

Endocrine System

A collection of glands that produce hormones regulating metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things.