Physical Science: Universe
Several galaxies come together to form what
A Cluster
What do all stars begin as
A Nebula
What is it called when massive stars explode
A Supernova
What is a galaxy
A group of dust, gas, and stars
What 3 factors affect the brightness of a star
Distance, mass, and temperature
What is the famous equation
E=MC^2
What would happen if gravity was weaker
Everything would be flying apart so fast that there wouldn't be a universe
Atoms release energy by _______ when they smash together
Fusion
What happens to make the star not turn into a brown dwarf
Fusion
What did Edwin Hubble Discover
Galaxies aren't stuck in the same place
What was the first force created
Gravity
Why don't stars blow apart
Gravity
What will eventually happen to the universe
It will come to an end
What was the third element created
Lithium
What is dark matter
Matter we can't see, Influences motion (of galaxies, stars, and planets), 23% of the the universe
How many stars can come from 1 Nebula
Millions
When were the hydrogen atoms in water made
Moments after the big bang
More pressure equals more or less gravity
More
What is first pathway of a star
Nebula - Protostar - Brown Dwarf
What is Second pathway of a star
Nebula - Protostar - Red Giant - Planetary Nebula - White Dwarf
What is the third pathway of a star
Nebula - Protostar - Supergiant - Red Giant - Supernova - Neutron Star
What is fourth pathway of a star
Nebula - Protostar - Supergiant - Supernova - Black Hole
What is left after a Supernova
Neutron star
List the spectral class
OBAFGKM
Whats at the center of a White Dwarf
Pure Carbon
What will the sun eventually turn into
Red Giant
What determines the fate of a star
Size
What can damage satellites and sppaceships
Solar Wind
The are more stars in the universe than
Specks of sand on Earth
An infrared telescope measured what
heat that passes through the nebulas
How is it possible that anything exists since antimatter and matter cancel out
There was more matter than antimatter
Why do smaller stars last longer
They don't require as much fuel as the bigger stars
How many Earths could fit inside the sun
1 Million
The first galaxies formed how many years after the big bang
1 billion
What is the approximate age of the universe
13.7 billion years
What temperature do atoms of gas begin to fuse together
15 million degrees
What year did Hubble discover this
1929
The first stars formed how many years after the big bang
200 million
What does it mean when the universe became transparent
380000 years after the big bang all of the milky fog dissapeared when all the H,He, Li was created
What is dark energy
73% of the universe and it counter gravity
How long does it take light from the sun to reach earth
8 minutes
Whats a Supernova
An explosion of a star
Why will every star eventually die
Because its fuel will run out.
Why are most stars in the Main sequence phase
Because its the longest phase
What are the four properties of stars
Color, Luminosity, Mass, Temperature
Red equals what
Cool
What are 2 pieces of evidence of the big bang
Cosmic back round radiation and the red shift
Why is the expansion of the universe accelerating
Dark Energy
What was the second element formed
Helium (In the first 3 minutes after the big bang)
What do hydrogen atoms create when they smash together
Helium and pure energy
How do we learn anything about stars since they are so far away
High tech telescopes and satellites
Blue equals what
Hot
What is absolute magnitude
How bright the stars actually are
What is apparent magnitude
How bright we, as humans, see the stars
What element was formed first
Hydrogen
What are the 5 common elements in star dust
Hydrogen, Carbon, Oxygen, Silicon, and Iron
What 3 things are needed to make a star
Hydrogen, Gravity, and Time
Good Luck Guys
I love you :)
What element do giant stars create right before they die
Iron
Why a physicists obsessed with the Big bang
It disobeys the laws of nature
Which parts of the Nebula contain the most matter
The dark parts
Whats Nuclear Fusion
The process of combining atoms
What does star dust create
The solar system, planets, and everything on them
What would happen if gravity was stronger
The universe would be a black hole
Whats a black hole
When a universe turns in on itself and everything gets sucked in
What is a nebula
When areas of space form a collection of gas and dust creating a cloud
What is protostar
When gravity pulls the gas and dust into the center of the cloud making a very dense core
What is a White Dwarf
When the core of a star becomes unstable and its outer layers get blown away
What is a brown dwarf
When the high temperature and high density makes the star's core collapse and eventually burns out
