Exam 16: The Evolution of the Universe

If the fate of the universe were determined SOLELY by what we currently know to be the total mass of the universe in luminous and dark matter (excluding dark energy),astronomers would predict that we live in a universe that will:

Why was the discovery of dark energy unexpected?

The flatness problem arises because only a universe with ________ can have that value forever.

Explain why astronomers cannot accurately model the exact history of the universe in the first few fractions of a second after the Big Bang.

Even with infinitely powerful telescopes,we can look back in time only until:

Why does the critical mass density of the universe depend on the value of the Hubble constant,H₀?

If dark energy is currently causing the expansion rate of the universe to increase with time,does this mean that you should worry that the Sun,Earth,and your body itself are expanding? Why or why not?

Why is the universe made up of matter as opposed to antimatter?

List the four fundamental forces of nature.

The inverse of the value of H₀ is a:

Name two predictions of the standard Big Bang theory that have been verified by observations.

What important event in the universe's history marked the creation of the cosmic microwave background radiation?

If multiverses exist,which of the following is correct?

Which of the following is NOT a prediction of the standard Big Bang theory that has been successfully verified by observations?

The critical density of the universe is approximately equal to: