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alien life
alien life
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Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
Laws of physics are...
not the same everywhere (so we live in an anisotropic universe)
the same everywhere (so we live in a homogeneous and isotropic universe)
2
Life on Earth really exploded...
1 billion years ago
2.5 billion years ago
4.2 billion years ago
500 million years ago
3
What is the Fermi paradox?
It is very unlikely life emerged elsewhere this is why we don't see aliens
It seems inevitable that life exists elsewhere
It seems inevitable that life exists elsewhere but we don't see any aliens
It is very unlikely life emerged elsewhere
4
What does the Copernican principle imply?
life only emerged on Earth
we are not special
Earth occupies a unique position
the universe is cold and hostile
5
The Moon stabilises the Earth's rotation and consequently its climate.
true
false
6
The universe as we know it is cold and hostile to life.
true
false
7
Because of their size, super-earths are...
great candidates to harbour life
not great candidates to harbour life
8
Which moon, with a liquid ocean under its icy surface, is a great candidate to harbour life?
Europa
Io
Deimos
Ganymede
9
SETI means...
search for extra-terrestrial information
search for extra-terrestrial intelligence
10
In theory, life can also emerge on a moon.
possible
impossible
in theory but not in practise
11
UAP means...
unknown aerial phenomenon
unidentified aerial phenomenon
unknown alien phenomenon
unidentified alien phenomenon
12
The goldilocks or habitable zone means...
Close to the parent star
Not too far and not too close to the parent star
Far from the parent star
A zone which is inhabited
13
A biosignature is...
when you sign with your own blood
any language used by aliens
gases in the atmosphere that reveal the presence of life
your signature along with your life story
14
Breakthrough Initiatives is a scientific program funded in 2015 with the help of...
Enrico Fermi
Carl Sagan
Frank Drake
Stephen Hawking
15
Venus is not inhabited but it is in the habitable zone of its parent star.
true
false
16
Because of gravity, super-earths would have...
more mountains
more low lands
17
The bigger the star...
The shorter it lives
The longer it lives
18
When we study alien life, the contradiction between high estimates and lack of evidence is known as...
the Fremen paradox
the Firme paradox
the Fremi paradox
the Fermi paradox
19
Because of the presence of water in the past, we are sure there was life on Mars.
true
false
20
For life to emerge, you don't need water, you can just have liquid methane or even liquid ammonia.
false
true
21
Jupiter protects Earth from...
alien invasion
asteroid impact
the Sun
a collision with Mars
22
UFO means
unidentified fleeing object
unknown flying object
unique flying object
unidentified flying object
23
It is difficult to escape gravity from a super-earth, but also from a small planet orbiting a red dwarf star.
true
false
24
We, homo sapiens, have lived for...
3 billion years
300,000 years
300 million years
3 million years
25
If we ever detect alien life for the first time, it will be...
with a picture from somebody's smart phone
with many images from many telescopes
with the naked eye
with special googles
26
The great filter theory posits that...
a strong magnetic field will protect the planet from radiations
the universe is cold and hostile
planet earth is not in the habitable zone
all civilisations become extinct after a while
27
What is the life span of a red dwarf star?
billions of years
millions of years
trillions of years
thousands of years
28
In our galaxy, there are about...
we have absolutely no idea
200 billion stars
200 trillion stars
200 million stars
29
How many earth-sized planets in the habitable zone of their parent stars are there in our galaxy?
11 trillion
11 billion
11 million
11 thousand
30
Life on earth emerged...
4.6 bya
300,000 years ago
500mya
3.7bya
