Expansion
What is the red/blue shift moving from the earth. Towards or away?
Blue: Towards
Red: Away
How long ago did the Big Bang Theory take place?
13.7 billion years ago
What are stars mainly made of?
Hydrogen and Helium
True or False - the Doppler effect is a piece of evidence supporting the Big Bang Theory
True
What is a wavelength?
The distance between crests of two waves.
Who discovered the blue/red shifts?
Edwin Hubble
What is the Big Bang Theory?
The belief that the earth was once squeezed into a very small volume and suddenly expanded.
The distance that light travels in one year is called what?
Light year
What is the Doppler effect?
An increase or decrease in the frequency of sound, light, or other waves.
What do we use to see the wavelengths?
A spectoscope
What frequency color is the lowest?
Red
What is cosmic background radiation?
The energy that is left over from the Big Bang Theory
What is apparent and absolute magnitude?
Apparent- How bright a star seems to be from Earth
Absolute- How bright a star really is
If a person is further away to a frequency is it low or a higher frequency sound?
Lower
What is the color of the shortest and longest wavelength?
Short: Purple
Long: Red
What frequency color is the highest frequency?
Violet
What direction is the cosmic radiation coming from?
All directions
What is nuclear fusion?
When 2 atoms bond together to one heavier atom
What sort of waves exhibit the Doppler effect?
Sound waves
The number of waves produced in a given amount of time is called what?
Frequency
How do we know that the universe is expanding?
The absorption of the lines on the galaxies
What are the 3 pieces of proof that help support the Big Bang Theory?
Composition of Universe
Doppler Effect/Red Shift
Cosmic Background Radiation
What is the definition of astronomical unit?
It's the distance between the sun and Earth.
What is the purpose of the Doppler effect?
It's used to measure the speed at which the stars and galaxies are approaching or going away from us
What's the scientific name for the range of wavelengths?
Electromagnetic spectrum