All About the Big Bang
What is the big bang theory?
The theory that 13 billion years ago the universe was created by a giant expansion.
Scientist think that dark energy acts as a__?
A force that opposes gravity
Analyzing the ripples in CMB tells us that kind of matter that humans, the planets, the stars, and matter between stars are made of makes up only __ of the universe?
4%
What is cosmology?
The study of the origin, structure, and future of the universe.
Many current theories of the universe began with observations made ______ years ago?
Less than 100
Scientists were _____ to accept the big bang?
Reluctant
The type of matter that does not give off light is called?
Dark matter
Recent evidence suggests that distant galaxies are _____ from earth than current theory would indicate?
Farther
What evidence supports the Big Bang Theory?
1. Hubble
2. Cosmic background radiation
Will the universe keep expanding or stop where it is now?
The universe will continue to expand.
The ____ is a theory of cosmic evolution?
Big Bang
Where did all the energy and matter we see today come from?
The big bang
What direction are other galaxies moving?
What do the spectra of distant galaxies collected today say about Hubble's original findings?
The images collected today confirm Hubble's original findings.
Because of dark energy, the universe's rate of expansion seems to be ______?
Accelerating
The big bang tells us how the universe ____, how it changed?
Evolved
What happens to the wavelength of light as you go from blue to red?
The wavelength increases.
How did the Hubble find out what galaxies were the most distant?
The Hubble saw that the most distant galaxies have the most red shift.
The theory of the big bang isn't something you figure out overnight, it takes ____ and ____ of collective wisdom?
Years and centuries.
In terms of expansion, what is true of the universe today?
The universe is expanding and galaxies are moving away from each other.
What is the temperature of the energy of the background radiation from the big bang?
3 degrees above absolute zero, the coldest temperature possible.
What percent of the universe is made up of dark matter and dark energy?
96% of the universe is made up of dark energy and dark matter.
What did Hubble discover near the end of the 1920s?
He found the spectra of the galaxies, except for the few closet to earth, were shifted towards the red end of the spectrum.
Astronomy was predicting the ____ of stars. Astrology was predicting how those stars____?
Motion, affected us
We're in the _____ of the big bang. The big bang is really our evolving ____ universe?
Aftermath, expanding.