Comets, Asteroids, and Meteoroids MCQs

1. What does the Big Bang Theory explain?
(A) The movement of planets
(B) The formation of galaxies only
(C) The structure of atoms
(D) The origin and expansion of the universe

2. Approximately how old is the universe, according to the Big Bang Theory?
(A) 13.8 billion years
(B) 4.5 million years
(C) 100 billion years
(D) 500 million years

3. What is believed to have existed before the Big Bang?
(A) Stars and galaxies
(B) Matter and time
(C) A black hole
(D) A singularity – a point of infinite density

4. What is cosmic microwave background radiation (CMB)?
(A) Radiation from the Sun
(B) Heat from volcanic eruptions
(C) Faint radiation left over from the Big Bang
(D) UV radiation from stars

5. Who proposed the idea of an expanding universe based on redshift observations?
(A) Stephen Hawking
(B) Albert Einstein
(C) Isaac Newton
(D) Edwin Hubble

6. What does redshift in light from galaxies indicate?
(A) Galaxies are moving away
(B) Galaxies are stationary
(C) Galaxies are moving closer
(D) Galaxies are disappearing

7. Which element was formed in the first few minutes after the Big Bang?
(A) Iron
(B) Uranium
(C) Hydrogen
(D) Oxygen

8. What is meant by the "expanding universe"?
(A) The Earth is increasing in size
(B) Space itself is stretching, increasing distance between galaxies
(C) Stars are growing larger
(D) Gravity is decreasing

9. What tool is used to observe the early universe and the Big Bang's effects?
(A) Microscope
(B) Spectrometer
(C) Radio
(D) Telescope

10. Which theory is the most widely accepted explanation of the universe's origin?
(A) Steady State Theory
(B) Oscillating Universe Theory
(C) Big Bang Theory
(D) Multiverse Theory