Youtube Exercise » English Grammar Homework

How Big is The Universe?

Science Time

13.5M views 2 years ago

Warm-up Questions

When you hear the title “How Big is The Universe?”, what numbers or units do you expect to hear (kilometers, light years, etc.)?
What is the biggest space object you already know (a planet, a galaxy, or something else)?
Do you think humans can ever travel to another star? Why or why not?

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Start With: Word Definition

Order: Alphabetical Random

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How Big is The Universe?

From Earth to the edge of the solar system (00:00 – 05:08)

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1. About how long does light take to travel from the Sun to Earth?

About 160 days
About 8 minutes and 20 seconds
About 19 years
About 4 hours and 15 minutes

2. What is described as the farthest human-made object from Earth?

The Moon
The heliopause
Voyager 1
Neptune

3. What is the heliopause in this video?

The point where light stops traveling
A region inside the Sun where energy is produced
The boundary where the Sun’s solar wind is stopped by the interstellar medium
A planet at the edge of the solar system

How Big is The Universe?

Nearest stars and the Milky Way to the Local Group (05:08 – 08:13)

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1. Why does the video say astronomers use the light year?

Because it measures time, not distance
Because light years are only used inside the solar system
Because the astronomical unit becomes impractical at colossal distances
Because it is smaller than a kilometer

2. According to the video, about how long would Voyager take to reach Alpha Centauri at its current speed?

About 19 years
About 10 million years
Over 70,000 years
About 8 minutes

3. What does the “human radio bubble” represent?

The farthest extent of human influence via radio and television broadcasts
A boundary where the Sun’s influence ceases
A cloud of icy objects beyond Neptune
The region of the Milky Way with the most planets

How Big is The Universe?

Superclusters and the observable universe (08:13 – 11:10)

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1. About how large is the Virgo supercluster said to be in diameter?

About 93 billion light years
About 100,000 light years
About 4.4 light years
About 110 million light years

2. What is the “great attractor” described as?

The earliest star system near Earth
The boundary of interstellar space
A telescope that discovered the pale blue dot
A mysterious region exerting a massive gravitational pull on galaxies

3. How does the video answer the question of how the universe can be so vast if it is 13.8 billion years old?

Because the observable universe is not measured in light years
Because planets move farther apart due to gravity alone
Because of cosmic expansion stretching space since the Big Bang
Because light sometimes travels faster than 300,000 km/s

How Big is The Universe?

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1. What is the main purpose of the video?

To compare distances and structures from Earth to the observable universe
To describe only the planets in the solar system
To prove that humans will soon colonize other galaxies
To explain how rockets are built and launched

2. Which idea is repeated throughout the video?

Astronomical units are always the best unit for measuring distance
Radio signals travel instantly across the Milky Way
The universe is definitely finite and fully mapped
Space is mostly empty, and the distances are hard to imagine

3. What does the video suggest about the size of the entire universe (beyond what we can observe)?

It is smaller than the Milky Way
It stops at the heliopause
It is unknown and could be infinite
It is exactly 93 billion light years across

Discussion Questions

Discuss the ideas from this video

How Big is The Universe?

Which comparison in the video helped you understand distance best (driving to the Moon, flying to the Sun/Mars, light travel time, etc.)? Why?
The video uses poetic phrases like “pale blue dot” and “cosmic ocean.” Do these metaphors make science easier to understand, or less precise?
If you could send one message in the “human radio bubble,” what would you want other civilizations to learn about Earth?
Do you think humans should focus more on space exploration or on protecting Earth? Explain using ideas from the video.