Which of These Commonly Used Metals Sometimes Occurs as a Native

question 20

Multiple Choice

Which of these commonly used metals sometimes occurs as a native metal?

• A) aluminum
• B) copper
• C) iron
• D) tin

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Definitions:

Microsleeps

Very short, uncontrollable episodes of sleep that occur while a person is apparently awake, especially common in people suffering from sleep deprivation.

Short-Term Memory

The capacity for holding a small amount of information in mind in an active, readily available state for a short period of time.

Anxiety

A mental health condition characterized by feelings of worry, anxiety, or fear that are strong enough to interfere with one's daily activities.

Gasping

An involuntary intake of air through the mouth, often as a reflex action due to surprise, shock, or the need for more oxygen.