Many Economically Important Metallic Elements Like Gold and Silver Are

question 68

Multiple Choice

Many economically important metallic elements like gold and silver are disseminated throughout magma. Why are we able to mine these metals?

• A) They are easy to pick out of lava flows with tools that reach a few meters away.
• B) They don't melt; they float in lava flows and are then trapped when the lava melts; humans go in and mine the lava flows.
• C) They become concentrated by fractional crystallization into the last bit of the magma that remains after most of the silicate minerals have formed.
• D) They float up to the surface of the lava and harden on top of the flow.

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Definitions:

Self-Representation

How individuals present and perceive themselves, often influenced by social and personal factors.

Self-Esteem

The subjective evaluation or perception of one's own worth, encompassing beliefs and emotions, including pride and shame.

Self-Regulation

The ability to control one's emotions, thoughts, and behaviors in accordance with long-term goals, often crucial for success and mental health.

Social Skills

Discrete, observable behaviors such as making eye contact, using appropriate language, asking appropriate questions, and so forth, which promote effective social interaction and which are part of the broader construct of social competence.