Zircon Crystals That Form in Molten Magma Are Easily Dated

question 58

Multiple Choice

Zircon crystals that form in molten magma are easily dated because they initially contain ____.​

• A) ​no lead
• B) ​no uranium
• C) ​uranium but no lead
• D) ​lead but no uranium
• E) ​both lead and uranium

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Definitions:

Helen Mayberg

A neurologist known for her pioneering research on the use of deep brain stimulation (DBS) for treating depression.

Depression

A mental health disorder characterized by persistently low mood, loss of interest in activities, and a significant impairment in daily functioning.

Dual-action Antidepressant

A type of medication that targets and adjusts the levels of more than one chemical messenger in the brain to treat depression.

Norepinephrine

A neurotransmitter and hormone involved in the body's response to stress, increasing heart rate, blood pressure, and sugar levels in the bloodstream.