-The area labeled "spark discharge" in the accompanying figure contained all of the following gases found in the ancient Earth atmosphere except:
A) carbon dioxide.
B) methane.
C) ammonia.
D) water vapor.
E) hydrogen gas.

Question

-The area labeled "spark discharge" in the accompanying figure contained all of the following gases found in the ancient Earth atmosphere except:  
A) carbon dioxide. 
B) methane. 
C) ammonia. 
D) water vapor. 
E) hydrogen gas.

Quizplus · Accepted Answer

The "spark discharge" experiments, which simulated conditions thought to be present on early Earth, primarily used a mixture of gases that included methane (CH4), ammonia (NH3), water vapor (H2O), and hydrogen gas (H2), but not carbon dioxide (CO2). These experiments aimed to demonstrate how organic molecules could have formed from simple inorganic molecules under early Earth conditions.

-The Area Labeled "Spark Discharge" in the Accompanying Figure Contained