Cosmology: Exploring the Universe

What is the Big Bang Theory?

• A popular TV show about a group of scientists

• A theory about the origin of life on Earth

• A conspiracy theory about the creation of the universe

• The prevailing cosmological model that explains the early development of the universe.

When did the Big Bang Theory occur?

• Less than 1 million years ago

• Approximately 13.8 billion years ago

• Approximately 100 million years ago

• Around 5 billion years ago

What is the evidence for the Big Bang Theory?

• The observation of quasars

• The existence of black holes

• The discovery of dark matter

• The cosmic microwave background radiation, the abundance of light elements, and the redshift of galaxies.

What is cosmic microwave background radiation?

• Reflection of sunlight off the Earth's atmosphere

• Energy emitted by black holes

• Radiation from the center of the Milky Way

• Residual radiation from the Big Bang

How does the expansion of the universe support the Big Bang Theory?

• The expansion of the universe has no relation to the Big Bang Theory

• The expansion of the universe is evidence that the universe was once in a hot, dense state, which aligns with the predictions of the Big Bang Theory.

• The expansion of the universe contradicts the Big Bang Theory

• The expansion of the universe is evidence of a steady state universe

What is redshift?

• Redshift is a type of fruit that is red in color

• Redshift is a popular brand of red-colored clothing

• Redshift is a phenomenon in which the light from an object is shifted towards longer wavelengths, often due to the object moving away from the observer.

• Redshift is a term used to describe the shift in color of a traffic light from green to red

What is Hubble's Law?

• Hubble's Law describes the relationship between the size of a galaxy and its color

• Hubble's Law describes the relationship between the distance of a galaxy from Earth and its velocity of recession.

• Hubble's Law is a theory about the formation of black holes

• Hubble's Law is a law of physics related to the behavior of light in space

What is the Hubble constant?

• The measure of the rate at which the universe is expanding.

• The measure of the rate at which galaxies are colliding.

• The measure of the rate at which the Earth is rotating.

• The measure of the rate at which the sun is expanding.

What is dark energy and how does it relate to the expansion of the universe?

• Dark energy is a form of radiation that is causing the expansion of the universe to remain constant.

• Dark energy is a mysterious force that is causing the expansion of the universe to accelerate.

• Dark energy is a type of matter that is causing the expansion of the universe to slow down.

• Dark energy is a result of the gravitational pull of galaxies that is causing the expansion of the universe to reverse.

What is the fate of the universe according to the expansion theory?

• Shrinking back to its original size

• Staying the same size forever

• Imploding and collapsing in on itself

• Continue expanding indefinitely