Big Bang Evidence
What is the leftover radiation from the Big Bang called?
Cosmic Microwave Background (CMB)
Which two elements formed first after the Big Bang?
Hydrogen and Helium
Which force primarily pulls gas and dust together to form galaxies?
Gravity
What is the term for the large-scale network of galaxy clusters and filaments?
Cosmic web
Write the formula for Hubble's Law
v = H0 x D
Redshift
Why were only light elements like hydrogen and helium formed in the early universe?
Because the universe expanded and cooled too quickly, allowing nuclear fusion only for lighter elements
What role does gravity play in creating stars within galaxies?
Gravity causes gas clouds to collapse and form stars
What do voids in the cosmic web represent?
Large empty regions with very little matter
If a galaxy is farther away, what does Hubble's Law predict about its velocity?
It will move away faster
Name one other piece of evidence, besides redshift and CMB, that supports the Big Bang
The abundance of hydrogen and helium in the universe
Approximately what percentage of the universe's normal matter is hydrogen and helium?
98%
Gravity pulled matter together into clumps, forming the first galaxies and large-scale structures
What type of map shows the distribution of galaxies across the universe?
Cosmic web map
A galaxy 100 Mpc away has a recessional velocity of 7000km/s. What is Hubble's constant?
H0 = 70km/s/Mpc