Cosmological Principle

What is the scale factor, a?
What equation is it the constant of proportionality for?

What is Hubbles Law?
(Define all letters)

What is the equation for the Hubble parameter?
What is it today?
What does it represent?

What are comoving coordinates?
- Definition
-Equation
-coordinates today

Red shift equations

Friedmann Equation
(define each term)

Fluid Equation
- explain each term

Acceleration Equation

Equation of state

Matter:
Definition
Pressure
Equation of state

Radiation:
Definition
Pressure
Equation of state

Dark energy:
Definition
Pressure
Equation of state

Matter domination:
density, a, and H
expansion?

Radiation domination:
density, a, and H
expansion?

Cosmological domination
a
expansion?

Deceleration parameter

Geometry = Flat
k?
Infinite?
Angles of a triangle?
Circle circumference?
Parallel lines?

Geometry = Closed
k?
Infinite?
Angles of a triangle?
Circle circumference?
Parallel lines?

Geometry = Open
k?
Infinite?
Angles of a triangle?
Circle circumference?
Parallel lines?

Critical density

Density parameter

Cosmological density parameter

Sum of density parameters

What happens at late times? (0 cosmological)
If k=0?
If k>0?
If k<0?

What happens at late times? (non-zero cosmological)

Sketch parametric solutions for closed universe
a(theta), t(theta), a(t)

Sketch parametric solutions for open universe
a(psi), t(psi, a(t)

General solution to friedmann equation
and curvature density parameter

Log density against log a

Expansion of the universe graph

Inflation time

Nucleosynthesis time

Time of matter-radiation equality

Decoupling time

Time of cosmological constant domination

Today (time)

Physical equation for density