The Big Bang Theory Vocabulary

Edit Answers
123456789101112131415161718
Across
  1. 2. The primordial, simplest, and most abundant element, created within the first 3 to 20 minutes of the universe’s existence through nucleosynthesis, forming roughly 75% of ordinary matter by mass.
  2. 4. The scientific study of the origin, evolution, and structure of the universe.
  3. 5. American astronomer who provided the foundational observational evidence for the Big Bang theory by proving the universe is expanding.
  4. 10. An American astronomer who, along with Arno Penzias, accidentally discovered the Cosmic Microwave Background radiation in 1964.
  5. 13. The faint, nearly uniform, remnant heat left over from the Big Bang, filling all space in the observable universe.
  6. 16. Massive, gravitationally bound systems formed from the coalescence of primordial gas and dark matter as the early universe cooled.
  7. 17. The second-lightest and second-most abundant element, forming about 24%–25% of the total mass of the universe.
  8. 18. The pinnacle of scientific genius, specifically for his work on relativity.
Down
  1. 1. A German-American physicist who, with Robert Wilson, serendipitously discovered the Cosmic Microwave Background radiation in 1965.
  2. 3. British astronomer who famously coined the term "Big Bang" during a 1949 BBC radio broadcast to describe a theory he strongly opposed.
  3. 6. The entire range of radiation emitted by the early universe, which has since been stretched by expansion into the cosmic microwave background.
  4. 7. All of space,time,matter, and energy.
  5. 8. The narrow range of electromagnetic radiation that the human eye can detect, spanning from violet to red.
  6. 9. The prevailing scientific model explaining that the universe began approximately 13.8 billion years ago from an extremely hot, dense point and has been expanding and cooling ever since.
  7. 11. An instrument that splits light from astronomical objects into a spectrum, used to determine composition, temperature, and velocity.
  8. 12. The foundational substance of the universe, representing the high-density, rapidly expanding primordial state that converted into all matter and radiation.
  9. 14. The increase in wavelength (stretching) of light from distant galaxies as it travels through expanding space.
  10. 15. The compression of light waves from an object moving toward an observer, shifting its light toward the blue-violet end of the spectrum.