The Origin of the Universe and the Solar System

What type of radiation in the universe is believed to the residue of the early universe?

• cosmic background microwave

• infrared rays

• radio waves

• ultraviolet waves

What force prevents individual galaxies from increasing in size despite the continuous expansion of the universe?

• black hole

• dark matter

• gravity

• redshift

What is the estimated age of the universe?

• 13.5 billion

• 13.8 billion

• 15.8 billion

• 18.3 billion

Where does the universe originate according to the big bang theory?

• cosmic explosion

• light elements

• nucleosynthesis

• singularity

Who observed galaxies moving away from us?

• Hubble

• Lemaitre

• Penzias

• Wilson

What is a theory?

• an educated guess

• scientific opinion

• validated conclusion

• well tested observation

What does the big bang theory explain?

• redshift phenomenon

• relationship of distance and velocity

• the origin of heavenly bodies

• the origin of the universe

Who observed galaxies moving away from us?

What is the central idea of the big bang theory?

• All matter in the universe started

  at a single point of origin.

• As the universe continues to

  expand, it will eventually

  collapse.

• When two or more galaxies

  collide, a big bang occurs.

• The current universe is at its

  original location of the cosmic

  explosion.

__________ refers to the formation of elements such as hydrogen and helium.