29.6.0 The Inflationary Universe

35. Scientists looking at an overview of physics today understand that there are four forces that govern all action in the universe. These four forces are the strong nuclear force, the weak nuclear force, electro-magnetism and a. gravity b. dark matter c. fusion d. inflation e. the force that Luke learned to use in Star Wars

a. gravity

37. How does a period of extremely fast inflation very early in the history of the universe explain the observation that the geometry of the universe looks flat (not curved) to us? a. during inflation a lot of the mass drained out of the universe, leaving its gravity much weaker b. inflation increased the size of the universe so much that the resulting universe looks flat from any point of view c. inflation led to the production of so much dark matter that the universe got pulled into the shape of a black hole d. inflation caused the temperature of different parts of the universe that can't see each other still be the same e. The universe is actually highly curved and not flat

b. inflation increased the size of the universe so much that the resulting universe looks flat from any point of view

34. One of the things that our current "standard model" of the Big Bang Theory doesn't explain is a. why the universe is expanding b. why there is a cosmic microwave background filling all of space c. why the temperature of the cosmic microwave background is so uniform throughout all of space d. why there is more helium in the universe than stars could have produced in 13.8 billion years e. why the galaxies show a red shift

c. why the temperature of the cosmic microwave background is so uniform throughout all of space

33. The model of the universe that involves an enormous increase of scale during a very short time in the early universe is called: a. the flat universe model b. the oscillating universe model c. the primeval atom model d. the inflationary universe model e. the cosmic burp model

d. the inflationary universe model

36. What is the strongest known force in the universe? a. gravity b. the electromagnetic force c. the weak nuclear force d. the strong nuclear force e. The Dallas Cowboys [put in your favorite local sports team here]

d. the strong nuclear force