Exploring the Universe

The video provides an overview of the universe, explaining its composition, origin, and expansion. It discusses the universe's components, including normal matter, dark matter, and dark energy. The Big Bang theory is introduced as the origin of the universe, which has been expanding since its inception. The observable universe is estimated to be 93 billion light years in diameter, but it could be much larger. The video also highlights interesting facts about the Milky Way and the number of galaxies and planets. The lesson concludes with an encouragement to explore more about the universe.

What is the universe primarily composed of?

• Galaxies and black holes

• Only stars and planets

• Matter, energy, and time

• Space and time

Which of the following is NOT a component of the universe's composition?

• Normal matter

• Dark matter

• Light energy

• Dark energy

What percentage of the universe is believed to be dark energy?

• 68%

• 100%

• 27%

• 5%

According to the Big Bang Theory, how long ago did the universe begin?

• 100 million years ago

• 13.7 billion years ago

• 4.5 billion years ago

• 1 trillion years ago

What event is believed to have marked the beginning of the universe?

• A gradual expansion

• A cosmic collision

• A sudden collapse

• A massive explosion

What is the estimated diameter of the observable universe?

• 93 million light years

• 93 billion light years

• 7 trillion light years

• 250 billion light years

Who discovered that the universe is expanding?

• Edwin Hubble

• Isaac Newton

• Galileo Galilei

• Albert Einstein

What is the phenomenon called when the universe expands?

• Compression

• Explosion

• Inflation

• Contraction

Approximately how many stars does the Milky Way contain?

• 1 trillion

• 1 billion

• 10 billion

• 100 billion

As of March 21, 2022, how many planets have been confirmed beyond our solar system?

• 500,000

• 50,000

• 5,000

• 500