Question 1

If there were no dark energy in the universe,the value of __________ would determine the evolution and fate of the universe.

Accepted Answer

A) H0 
B) 1/H0 
C) Ωluminous 
D) Ωmass 
E) ΩΛ 
A) H0 
B) 1/H0 
C) Ωluminous 
D) Ωmass 
E) ΩΛ

Question 2

The critical density of the universe is closest to:

Accepted Answer

A) 1 proton/m3 
B) 1 g/m3 
C) 1 kg/m3 
D) 1 MEarth/m3 
E) 1 M⨀/m3 
A) 1 proton/m3 
B) 1 g/m3 
C) 1 kg/m3 
D) 1 MEarth/m3 
E) 1 M⨀/m3

Question 3

Dark energy is a force that continually decreases the expansion rate of the universe.

Accepted Answer

A) True 
 B)False

Question 4

To verify whether or not some grand unified theories are correct,physicists are searching for:

Accepted Answer

A) the Big Rip 
B) mini-black holes 
C) antimatter 
D) protons that decay 
E) dark matter that decays 
A) the Big Rip 
B) mini-black holes 
C) antimatter 
D) protons that decay 
E) dark matter that decays

Question 5

Gravity acts to __________ the expansion of the universe,and dark energy acts to __________ the expansion.

Accepted Answer

A) slow;slow 
B) slow;speed up 
C) speed up;slow 
D) speed up;speed up 
A) slow;slow 
B) slow;speed up 
C) speed up;slow 
D) speed up;speed up

If there were no dark energy in the universe,the value of __________ would determine the evolution and fate of the universe.

The critical density of the universe is closest to:

Dark energy is a force that continually decreases the expansion rate of the universe.

To verify whether or not some grand unified theories are correct,physicists are searching for:

Gravity acts to the expansion of the universe,and dark energy acts to the expansion.

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornments Moons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Our Starthe Sun

Star Formation and the Interstellar Medium

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Large-Scale Structure in the Universe

Life

Filters

Exam 22: Modern Cosmology

If there were no dark energy in the universe,the value of __________ would determine the evolution and fate of the universe.

The critical density of the universe is closest to:

Dark energy is a force that continually decreases the expansion rate of the universe.

To verify whether or not some grand unified theories are correct,physicists are searching for:

Gravity acts to __________ the expansion of the universe,and dark energy acts to __________ the expansion.

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornments Moons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Our Starthe Sun

Star Formation and the Interstellar Medium

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Large-Scale Structure in the Universe

Life

Filters

Gravity acts to the expansion of the universe,and dark energy acts to the expansion.