WCHS Week 8 - The Origin of the Universe

2. The model before the 1900’s that the universe was and always has been as we see it now.
3. Correctly predicted the wavelength of Cosmic Background Radiation decades before we could detect it.
5. The type of atoms (with electrons) that were first formed some 380,000 years after the Big Bang.
7. The time it took to form protons, neutrons and electrons after the Big Bang.
12. The idea that all galaxies began in one location and are receding from each other.
14. This doppler shift provides evidence that the universe is expanding.
15. Inaccurately included the “cosmological constant” to explain why the universe was not collapsing or expanding.
17. Discovered that the farther away objects are from us, the faster they move away from us.
20. We see this galaxy as it was 2.5 million years ago.
21. This is the most abundant element in the universe.
22. The study of the universe.

1. About a quarter of the universe is composed of this, but we can’t see it because it gives off no light or other EM radiation.
4. The leftover energy/heat from the Big Bang is in this section of the EM spectrum.
6. The idea that the farther away something is, the longer in the past we see it.
8. The effect that gravity has on the light around it (how we know dark matter exists).
9. The time it took to form hydrogen and helium after the Big Bang.
10. These explosions created all the heavy elements that make up our planet & all the life on it.
11. The name for the one infinitesimally small point that contained all the “stuff” of the Big Bang.
13. The temperature (in Kelvin) of “empty” space.
16. A tested and verified explanation of a scientific aspect of the natural world.
18. This force is causing the expansion of the universe to accelerate.
19. The Big Bang doesn’t move galaxies, instead it stretches THIS - which makes the galaxies spread out.