Question

Various observations suggest there may be recent or even continuing volcanic activity on Venus. Which of the following has NOT been observed?

a) Detection of volcanic hotspots
b) Evidence of lava flows
c) Presence of active geysers
d) Identification of volcanic gas emissions

Answer 1

Active geysers have not been observed on Venus; however, volcanic hotspots, lava flows, and volcanic gas emissions have all been identified.

Step-by-step explanation:

The question pertains to the identification of volcanic activity on Venus and asks which of the given options has not been observed. Among the given choices, detection of volcanic hotspots, evidence of lava flows, and identification of volcanic gas emissions have all been observed on Venus. These observations support the idea that Venus has undergone widespread volcanism. However, the presence of active geysers has not been confirmed on Venus, making it the correct answer. On Earth, geysers are generally associated with water, and the high temperatures on Venus would make the presence of liquid water, and thereby water-based geysers, exceedingly unlikely.