What does CMBR stand for?
Cosmic microwave background radiation
Cosmological microwave background radiation
Cosmic microwave background radiography
What are the three main pieces of evidence for the Big Bang Theory?
We can still hear the explosion with special equipment
We can detect radiation left over from the big bang (CMBR)
We can tell that all distant galaxies are moving away from us because they are red-shifted
We can tell that all distant galaxies are moving closer to us because they are red-shifted
Very distant galaxies move faster away from us than closer ones
The light from distant galaxies appears more blue than it should because the waves emitted have a shorter wavelength due to the doppler effect
How old is the universe estimated to be?
13.7 thousand years old
13.7 million years old
13.7 billion years old
The further away a galaxy is from us, the faster it is moving away from us
According to the Doppler effect, what happens to sound waves emitted at a constant pitch from a car moving towards you?
They move more quickly, so their pitch increases
Their wavelength increases, so their pitch increases
Their frequency increases, so their pitch increases
What piece of evidence is only explained using the Big Bang Theory?
What do missing wavelengths/black lines on the spectrum of light wavelengths emitted from a star mean?
These are the chemical components of dust in space between us and the star absorbing certain light frequencies
These are the chemical components of the star absorbing certain light frequencies
These form when there are solar flares which interrupt the emission of light from the star
All elements absorb the same wavelength of light
The absorption lines on the Spectra of distant galaxies are shifted ______ relative to the sun