Understanding Dark Energy and Universe Expansion

Who were the leaders of the team that discovered the accelerating expansion of the Universe?

• Albert Einstein, Edwin Hubble, and Carl Sagan

• Saul Perlmutter, Brian Schmidt, and Adam Ries

• Stephen Hawking, Richard Feynman, and Niels Bohr

• Isaac Newton, Galileo Galilei, and Johannes Kepler

What did Edwin Hubble discover about the galaxies in the Universe?

• They are all moving towards us.

• They are stationary.

• They are colliding with each other.

• They are moving away from us.

What is the cause of the redshift observed in distant galaxies?

• Stars within galaxies exploding

• Galaxies shrinking

• Space itself expanding

• Galaxies moving through space

What could happen if the Universe is very dense?

• It will expand forever.

• It will stop expanding and reverse.

• It will remain static.

• It will collapse into a black hole.

How do scientists use supernovae to measure distances in the Universe?

• By measuring their temperature

• By measuring their brightness

• By observing their color

• By counting their number

What was the surprising result about the Universe's expansion discovered using supernovae?

• The Universe is expanding at a constant rate.

• The Universe is decelerating.

• The Universe is accelerating in its expansion.

• The Universe is shrinking.

What term is used to describe the mysterious force causing the Universe's accelerated expansion?

• Cosmic rays

• Anti-matter

• Dark energy

• Dark matter

What percentage of the Universe is thought to be made up of dark energy?

• 50%

• 30%

• 70%

• 10%

What is the significance of dark energy in modern physics?

• It is the key to understanding black holes.

• It is responsible for the creation of galaxies.

• It explains the formation of stars.

• It may provide a clue to a quantum theory of gravity.

What did Einstein originally introduce to explain a static Universe?

• Quantum mechanics

• Theory of Relativity

• Cosmological constant

• Newton's laws