Stars
Waves
The Doppler Effect
Where did it come from?
Big Bang Evidence
Hodge Podge
100
The main element in all stars
Hydrogen
100
The name for this part of a wave.
Trough
100
When an ambulance passes, this is how the sound of its siren seems to change, according to the Doppler Effect
The pitch changes from high to low.
100
Where does a white dwarf come from?
The end stage of a small star
100
It's what the M stands for in CMBR
microwave
100
The age of the universe (within 0.1 billion years)
13.7
200
The name of the process in which hydrogen atoms join to become helium atoms in a star
Nuclear fusion
200
It's the name for this part of a wave.
Crest
200
When a moving object gives off waves, this is what happens to the waves in front of the object
They get compressed (shorter wavelength)
200
It's how carbon, oxygen, neon (and other elements heavier than Hydrogen and no heavier than Iron) are created.
Fusion in a star
200
This is what the CMBR represents, providing evidence for the Big Bang theory
Heat left over from the Big Bang.
200
The highest energy type of electromagnetic wave
Gamma Rays
300
Star A has absolute magnitude of -1.2. Star B has absolute magnitude of 3.0. Which star is brighter?
Star A
300
It's where a wavelength ends if it starts at letter A.
E
300
It's the letter that the source of this sound is moving toward.
H
300
It's where hydrogen was created
The Big Bang (inflation)
300
This is what Hubble observed, providing evidence for the Big Bang.
All distant galaxies are moving away from us
or
All distant galaxies have red shifts
300
This picture represents...
Emission spectra
400
Elements in a large star will fuse up to which element?
Iron
400
It's the set of sound waves with the longest wavelength.
B
400
It's the letter where a listener will soon hear the lowest pitch.
D
400
It's where the CMBR (cosmic microwave background radiation) came from.
The big bang (heat left over)
400
A third piece of evidence for the Big Bang was that the theory predicted something about the matter in the Universe, and that something turned out to be true. The prediction was...
That the matter in the Universe is approximately 75% hydrogen and 25% Helium.
400
Doppler Effect
500
Which two forces keep a main sequence star stable, and name this process.
Gravitational force inwards and nuclear pressure outwards. This is called hydrostatic equilibrium.
500
The only way to change the speed of a wave is to change...
the medium it travels through
500
It's the kind of doppler shift the person will see, based on the movement of this star.
Red shift
500
It's how gold, lead, mercury, uranium, and all other elements heavier than iron are created.
In a Supernova
500
These are the three most important pieces of evidence for the Big Bang theory
The CMBR (heat left over from the big bang)
Hubble's Law (all distant galaxies have red shifts...)
The Universe is 75% H and 25%He, as the Big Bang theory predicted.
500
It's what these spectral lines are showing us
All galaxies are red shifted (moving away). More distant galaxies are moving away faster.