Section 4

Speed of galaxy rotation curves

How do galaxy rotation curves provide evidence for dark matter?

Equation for M(<r) in terms of density

What galaxy cluster observations indicate dark matter?

How does virial theorem support dark matter?

How does baryon fraction from x-ray gas support dark matter?

How does mass distribution from gravitational lensing support dark matter?

explain how the clustering of galaxies constrains the neutrino density parameter

Define WIMPs

Explain why WIMPs are produced with right density

Describe how WIMPs can be detected

Define Axions
and how they can be detected

Define primordial black holes
and how they can be detected

Deceleration parameter for flat universe containing matter and cosmological constant

What are type 1a supernovae?
What do the observations tell us?

What is the cosmological constant problem?

What is the fluid description?

What is quintessence?