Vocabulary
About 13.7 billion years ago, the universe expanded suddenly from a very hot, condensed state.
The Big Bang Theory
Redshift
The explanation for sound changing as it passes by you...like a siren on an ambulance.
The Doppler Effect
What was the significance of Redshift of galaxies?
It gave evidence for the expanding universe.
The same natural laws operated in the past as they do today
Cosmic Microwave Background Radiation (CMBR)
In light, Redshift is when objects are moving in which direction?
Away
How many years ago the universe began.
A change in the frequency/sound of a wave when an object moves relative to the observer.
This is the leading theory of the beginning of the universe
The Big Bang Theory
In light, blue shift is when objects are moving which direction
Closer
No, it comes from all directions.
This state of matter that consists of charged particles rather than neutral atoms
Plasma
What is important about Hubble’s discovery of red shift in galaxy spectra?
It suggests that the universe is expanding.
What did Mrs. Gibson use in class to demonstrate the Doppler Effect, Redshift, and Blueshift?
A Slinky
A few degrees above absolute zero.
The temperature of the universe.
Remnant of the first light/energy emitted after the big bang
Cosmic Microwave Background Radiation (CMBR)
Which model that we did in class, proved Edwin Hubble's theory "The Farther Away a Galaxy Is, the Faster it is Moving"?
The Rubber Band Model/Activity
Why is the Doppler Effect important for proving the Big Bang?
It proved that all galaxies were moving AWAY from each other, demonstrating expansion.
Mrs. Gibson