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WGU Integrated Physical Sciences (C165, C908) Exam - Topic 2 Question 15 Discussion

Posted by Nada on Jul 15, 2026 at 05:45 PM

In 1996, NASA scientists claimed that a Martian meteor contained chemical compounds that indicated life on Mars 3.6 billion years ago. However, further studies showed that the same chemical compounds were found in rocks from the Moon, where no life ever existed.

What is the appropriate scientific approach for dealing with this contradiction?

Suggested Answer: B

**Identify the contradiction:** NASA scientists found chemical compounds in a Martian meteor that suggested the possibility of ancient life on Mars. However, similar compounds were also found in Moon rocks, where life is not believed to have existed. - **Analyze the evidence:** The presence of these compounds on both Mars and the Moon suggests that these compounds are not unique indicators of life. - **Scientific approach:** To resolve the contradiction, scientists must consider the broader context and properties of these compounds. The appropriate response is to recognize that the compounds alone do not provide conclusive evidence of life. This requires a cautious interpretation of the findings and a search for additional, more definitive indicators of life. - **Conclusion:** The correct approach is to understand that these chemical compounds do not necessarily indicate life, as their presence can be attributed to non-biological processes as well. **Reference:** Integrated Physical Sciences textbooks, scientific journals on astrobiology, and NASA reports on Martian and lunar geology.


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12 comments · newest first
XU
Xuan 1 month ago
But what if life did exist on both? Option D is interesting too.
MI
Mitsue 1 month ago
Agreed! Just because the compounds are similar doesn't mean life existed.
DA
Dalene 1 month ago
I think option B makes the most sense. We need more evidence.
KI
King 2 months ago
I don't think we can just dismiss the possibility of life on Mars!
DE
Derrick 2 months ago
Definitely B. We need more evidence before jumping to conclusions.
MA
Margot 2 months ago
Wait, so they found the same stuff on the Moon? That's wild!
JA
Jarvis 2 months ago
But those compounds can form without life, right?
BU
Buck 2 months ago
I remember that claim from NASA!
SA
Samira 2 months ago
I feel like option B makes the most sense, but I wonder if there's a chance that life could have existed on both Mars and the Moon.
MA
Mary 3 months ago
This reminds me of a practice question where we had to evaluate evidence for extraterrestrial life. I think we should focus on the implications of the chemical compounds instead of assuming life existed.
GL
Glendora 3 months ago
I’m not entirely sure, but I think we should be cautious about jumping to conclusions based on limited data.
DE
Delisa 3 months ago
I remember discussing how scientific claims should be supported by evidence, so I think we need to analyze the compounds further.
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