Compared to the Geologic Record Extending Back Hundreds of Thousands

question 67

Multiple Choice

Compared to the geologic record extending back hundreds of thousands of years,which of the following statements is correct regarding the record of atmospheric carbon dioxide over the past 50 years?

• A) Atmospheric carbon dioxide concentrations are lower now than at any time in the past several hundred thousand years.
• B) Atmospheric carbon dioxide concentrations have remained constant for the past 50 years, which is different from the rapid fluctuations in the past.
• C) The rate of change of atmospheric carbon dioxide concentration is much slower now than it was in previous warm periods.
• D) The rate of change of atmospheric carbon dioxide concentration is much faster now than it was in previous warm periods.
• E) The trend in atmospheric carbon dioxide concentration today is what you would expect from Milankovitch forcing of climate.

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Definitions:

Agoraphobia

A type of anxiety disorder characterized by an intense fear of being in situations where escape might be difficult or help would not be available in the event of a panic attack or panic-like symptoms.

Marketplace

An economic term describing a space or system where goods and services are exchanged between buyers and sellers.

Closed Places

Refers to confined or restricted spatial areas that may induce feelings of entrapment or claustrophobia.

Blood-Injection-Injury Type Phobias

Extreme fears of seeing blood or an injury or of receiving an injection or another invasive medical procedure, which cause a drop in heart rate and blood pressure and fainting.