science

The Fermi Paradox

Explore the Fermi Paradox in this B1 English reading comprehension worksheet about space, aliens, and the universe.

Title

The Fermi Paradox

Seo_intro

Explore the Fermi Paradox in this B1 English reading comprehension worksheet about space, aliens, and the universe.

Reading Text

The universe is incredibly huge. It has billions of galaxies, and each galaxy has billions of stars. Many of these stars have planets like our Earth orbiting them. Because the universe is so large and so old, it seems very likely that other intelligent life exists. We call these other beings 'aliens.' If there are so many planets and so many chances for life, where is everybody? This big question is called the Fermi Paradox. It was named after Enrico Fermi, a famous scientist. In 1950, he was talking with his friends about the size of the universe. He realized that if alien civilizations exist, some of them should be much older than ours. They should have had enough time to invent fast spaceships and travel across the galaxy. We should see signs of them, like messages, spaceships, or even robots. But when we look into space, we see nothing. It is completely silent. Scientists have thought of many possible answers to this paradox. One idea is that we are truly alone. Maybe life is extremely rare, and Earth is the only place where it ever started. Another idea is that space is just too big. Even if aliens exist, the distance between stars is too great for them to travel here. A third idea is very scary: maybe intelligent civilizations always destroy themselves with wars or pollution before they can explore space. Some researchers believe aliens might be watching us, like animals in a zoo, but they choose not to contact us. They might want us to develop naturally without interference. Others think we just don't know how to listen properly. Aliens might use technology to send signals that we do not understand yet. Today, scientists use large telescopes to search the sky for any messages. This project is called SETI (Search for Extraterrestrial Intelligence). They hope to find a radio message from another world. Until then, the Fermi Paradox remains one of the greatest mysteries in science. Are we alone in the dark universe, or is it full of life that we just can't see?

Activities

Vocabulary

Definitions:

Text: All of space and everything in it, including stars and planets.
Text: Able to learn, think, and understand complicated things.
Text: Large human or alien societies with developed culture and science.
Text: Vehicles designed for traveling in outer space.
Text: Not common; very unusual to find.
Text: The amount of space between two places or things.
Text: To damage something so badly that it cannot be fixed.
Text: To communicate with someone or reach out to them.
Text: Equipment shaped like long tubes, used for looking at things that are very far away.
Text: Sounds, lights, or radio waves that carry a message or information.

Items:

Label: universe
Answer: A
Label: intelligent
Answer: B
Label: civilizations
Answer: C
Label: spaceships
Answer: D
Label: rare
Answer: E
Label: distance
Answer: F
Label: destroy
Answer: G
Label: contact
Answer: H
Label: telescopes
Answer: I
Label: signals
Answer: J

Fill In The Blanks:

Before: Our solar system is just a tiny part of the massive
After: .
Answer: universe
Before: Dolphins and chimpanzees are very
After: animals that can learn tricks quickly.
Answer: intelligent
Before: Ancient
After: like the Romans built amazing cities.
Answer: civilizations
Before: Astronauts travel into orbit using modern
After: like the space shuttle.
Answer: spaceships
Before: Finding a diamond in your backyard is a very
After: event.
Answer: rare
Before: The
After: from Earth to the Sun is about 150 million kilometers.
Answer: distance
Before: A huge storm can completely
After: a small town.
Answer: destroy
Before: Please
After: me by email if you have any questions.
Answer: contact
Before: Astronomers use powerful
After: to study distant galaxies.
Answer: telescopes
Before: The radio tower sends
After: across the whole city so we can listen to music.
Answer: signals

Scrambled:

Text: incredibly / The / huge / is / universe / .
Answer: The universe is incredibly huge.
Text: everybody / Where / is / ?
Answer: Where is everybody?
Text: alone / are / truly / We / .
Answer: We are truly alone.
Text: us / choose / to / contact / not / They / .
Answer: They choose not to contact us.
Text: sky / search / to / telescopes / Scientists / the / use / .
Answer: Scientists use telescopes to search the sky.

Comprehension

Questions:

Text: The Fermi Paradox asks why we haven't seen any aliens yet.
Answer: true
Text: Enrico Fermi believed that Earth was definitely the only planet with life.
Answer: false
Text: What does SETI stand for?
Options:
- Space Exploration and Travel Institute
- Search for Extraterrestrial Intelligence
- Science and Engineering of Telescopes Internationally
- Stars, Earth, and The Internet
Answer: Search for Extraterrestrial Intelligence
Text: According to the text, what is one reason aliens might NOT have visited us?
Options:
- They are afraid of humans.
- They don't have spaceships.
- The distance between stars is too great.
- They do not like our planet's weather.
Answer: The distance between stars is too great.
Text: What tool do scientists use to search for alien messages?
Options:
- Microphones
- Telescopes
- Spaceships
- Robots
Answer: Telescopes

Written Expression

Questions:

Text: Do you think intelligent aliens exist somewhere in the universe? Why or why not?
Text: If you could send a short, friendly message to an alien civilization, what would you say?

Examples:

I think aliens do exist because the universe is so big that there must be other planets like Earth.
Hello! We live on a blue planet called Earth. We love music and peace. Please come visit us safely!