Universe
The theory that most scientist believes explains how our universe began is called ________________.
Big Bang Theory
Galaxies that are redshifted are:
Moving away from earth
The Big Bang Theory explains the formation of the...
universe
as the source of the waves moves, it changes frequency and wavelength to the observer
doppler effect
This star is the closest star to Earth...
The Sun
In Greek, atoms means this...
uncuttable
As galaxies move away from our galaxy a shift on the electromagnetic spectrum (EMS) is noticed. This phenomena is called _____________.
Redshift
RED shift of light means the star is moving
Away from Earth
BLUE shift of light means the star is moving
towards Earth
Ever since the universe began, the universe has been
expanding
Stars are giant balls of hot gas made of what?
Mostly made up of HYDROGEN & HELIUM.
protons
According to the Big Bang Theory, the universe started as a __________, a small ball of gas and dust that was extremely dense.
singularity/fireball
Most distant galaxies show a RED SHIFT. This is considered EVIDENCE that the universe is ___.
expanding
A galaxy showing BLUE SHIFT is ___.
moving towards/ getting closer to earth
Which elements are most abundant in the visible universe?
Hydrogen and Helium
These can be considered star "nurseries"...
Molecular Clouds
this star is VERY HOT, but not bright
white dwarf
(True/False) Big Bang theorists believe that most matter should be complex, large atoms, like gold and plutonium.
False
The remaining energy (radiation) from the big bang is called ________.
CMB -Cosmic Background Radiation
According to Redshift, the farther away a galaxy is, the _____________ it is moving away from earth.
faster
What is one piece of evidence of the Big Bang Theory?
Red shift or Cosmic Background
the process where the hydrogen nuclei collide and combine with helium in their cores, which gives off massive amounts of energy.
nuclear fusion
a red supergiant near the end of its lifecycle will turn into this explosion...
supernova
Which SCIENTIST was responsible for contributing to the findings of the Big Bang Theory?
Edwin Hubble
If something that makes light is moving AWAY from you, it spreads the wavelengths of light out. This application of the Doppler effect is known as ___.
red shift
A date that is commonly accepted by Big Bang theorists for the Big Bang is ____ years ago
13-15 billion
a group of millions or billions of stars are called
galaxies
Near the end of its life, what does a high mass star become?
A Supernova
the process by which stars create heavier elements from lighter ones through nuclear fusion, powering their light and heat
stellar nucleosynthesis
(True/False) The Big Bang Theory is the most widely accepted theory about the origin of the universe
True
The universe is expanding (stars are moving away form us), but what exactly is expanding?
Space
The most abundant element in the universe today is:
Hydrogen
How is the "Big Bang" described?
A dense, small ball of matter that exploded and rapidly expanded (and is still expanding), which created the Universe we know today.
this is a scatter plot of stars showing the relationship between the stars’ luminosity and temperature of stars.
H-R Diagram/Hertzsprung-Russell Diagram
what is a solar flare
sudden, intense explosion of energy and radiation from the Sun's surface