What might alien astronomers have detected from Earth 10,000 years ago?
TED: The fingerprints of life beyond Earth | Clara Sousa-Silva

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Chemistry, Biology, Science
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11th - 12th Grade
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Artificial satellites
Radio signals
A thick and temperate atmosphere
Signs of advanced technology
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is oxygen considered a potentially misleading biosignature?
It is not visible from space
It is too rare to detect
It can be produced without biological processes
It is only found on Earth
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What makes phosphine a more reliable biosignature than oxygen?
It is a byproduct of photosynthesis
It has fewer false positives for life
It is easier to detect
It is commonly found on all planets
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Where on Earth is phosphine commonly found?
In oxygen-rich environments
In the atmosphere
In swamps and rice fields
In volcanic regions
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of detecting phosphine on Venus?
It indicates volcanic activity
It confirms the presence of life
It suggests a potential biosignature
It proves the existence of water
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the speaker's main concern regarding the search for life?
Failing to find a habitable planet
Not having enough telescopes
Detecting too many false positives
Missing signs of life on an inhabited planet
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What approach does the speaker suggest for detecting life?
Focusing on a single molecule
Analyzing a network of gases
Using only ground-based telescopes
Relying solely on oxygen detection
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