The Big What?
The moment that the universe began to expand.
A police car driving past you, a wolf howling and running towards a person, a man playing a trumpet as he skis down a hill - these are all examples of what?
The Doppler Effect
Each color of light is a different ____ ____ of electromagnetic radiation.
What is Wave Length?
When an object is moving toward you, the wavelength will be shifted towards which side of the color spectrum?
what is blue
What happens to light waves as they are redshifted?
They stretch out, wavelength increases.
How old is the universe?
About 14 billion years old.
The Doppler Effect is three things - name them!
1. Evidence for the Big Bang 2. A natural law of physics 3. A cool Halloween costume
Which color of visible light has the shortest wavelength?
Blue
George Gamow stated that how much of the universe is made up of Helium and Hydrogen?
What is 99%
What happens to light waves as they are blueshifted?
They get closer together, wavelength decreases.
What is still happening to our universe today as a result of the Big Bang?
It is still expanding.
How does the frequency of the soundwaves change as the source of sound moves toward the observer?
Frequency increases, the sound sounds more high pitched.
The colors in a spectrum go in the same order as the colors in a ______.
what is rainbow (ROYGBIV)
What does Hubble's Law State?
What is The further the galaxy is from us the faster it is moving away
What does redshift indicate about an object?
What is moving away
Why do Scientists accept the Big Bang THEORY?
Three pieces of evidence support the theory.
The frequency from the buzzer got ____ when it approached me, and it got ____ when it passed me.
what is higher, lower
As wavelength increases, frequency...
Decreases.
How does CMB radiation support the Big Bang?
What is energy left behind from the Big Bang expansion/explosion in the form of radiation.
Spectroscopy
What are the 3 pieces of evidence supporting the Big Bang?
Comic (Microwave) Background Radiation, Abundance of Elements, and Redshift
DUEL! All teams compete! Convince Mrs. Firestone that your team deserves these 500 points by stating information learned from class.
:)
What is a source of gamma waves on Earth?
Nuclear explosions.
Name the two scientists who first detected the CMB.
Arno Penzias and Robert Wilson (or Penzias and Wilson)
Why is redshift evidence for the Big Bang?
According to the Doppler Effect, waves stretch out as their source moves away from the observer. The light of distant galaxies is stretching out (redshifted). This means that everything in the universe is moving away from Earth and the universe is expanding. It has been expanding since the Big Bang.