Space and time
Which statement about the Big Bang is correct?
a) It occurred at a specific location in space
b) It was a point in time, not in space
c) It only affected our galaxy
d) It happened gradually over millions of years
It was a point in time, not in space
In which step did the universe expand faster than the seep of light?
Cosmic Inflation
Describe the singularity
The beginning of the Big Bang.
All energy that will ever be, exists in an infinitely small, dense, hot protoparticle.
This is where space and time begin.
What was Einstein's initial belief about the universe in the early 1900s?
The Milky Way was the entire universe and it was static.
What is the significance of the Cosmic Microwave Background Radiation (CMBR)?
It is evidence of the Big Bang.
During the seperation of the four forces, which force seperated first?
gravity
Which statement about quarks in the early universe is correct?
a) Quarks immediately formed stable atoms
b) Quarks formed the first protons and neutrons as the universe cooled
c) Quarks were evenly split between matter and antimatter
d) Quarks were created after the formation of hydrogen
b) Quarks formed the first protons and neutrons as the universe cooled
Who proposed that the universe might have originated from a single point in the past?
Georges Lemaître
Why is there so much hydrogen in the universe?
Neutrons decay into protons and electrons, forming hydrogen
What was the ratio of matter to antimatter after pair production/annihilation?
1 in 10 billion
During Big Bang nucleosynthesis, which elements was formed?
Hydrogen and helium isotopes and some lithium.
What does Hubble's Law describe?
The farther a galaxy is, the faster it is moving away from us.
Where did the Big Bang happen?
Everywhere all at once
In which step did energy and matter interchange back and forth?
Pair production and annihilation.
Describe how the first matter was formed.
Slamming Gamma Rays together forms Matter/Antimatter pairs.
In the end, there is just a little more matter than antimatter (1 in 10 billion).
The first matter was in the form of quarks.
Which came first, the first stars, or recombination?
recombination
What is 1 thing that can go faster than the speed of light?
Space itself
Describe recombination
As the universe expanded and cooled, electrons combined with nuclei to form neutral atoms — mostly hydrogen.
Now light can travel through space.