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Matter & Astronomy

Atom Smallest unit of matter
Atoms The building blocks of all matter
The Big Bang Theory The universe expanded from an extremely dense and hot explosion and continues to expand today
Black Dwarf A dead star that is no longer hot nor bright
Blue Main Sequence Star short lives because they use a lot of fuel
cosmic background radiation is the leftover thermal energy from the big bang. This energy was distributed as the universe expanded
density The measure of how tightly particles are packed together in a given substance. It is calculated by dividing mass by volume
Element The smallest form of matter that cannot be broken down into different substances
The first stage of a star's life Protostar
A high-mass star can continue to fuse elements in its core up to which element? iron
In white dwarf, the mass of the Sun is packed into the volume of what? The planet size of Earth
Is Matter..... Molecules, Acid Rain, Gasses
It becomes this when it is ignited Main Sequence Star
Main Sequence Star A star during the main part of its life cycle where it is using hydrogen as fuel
Mass How much matter is in an object
Matter Anything that has mass and takes up space
Matter is NOT Gravity, Lighting, Fear
Most large mass stars turn into...... Black Hole
Nebula The concentration of dust clouds and gas in space that forms a star
Neutron Star Created when the giant stars die in Supernovas and their core collapse
Neutron Star The core of a red supergiant that has collapsed but can be seen
Nuclear Fusion When nuclei of hydrogen atoms join to form helium and they release energy in the process
Nuclear Fusion When two nuclei combine to form a heavier element
Our Solar System is.... 4.6 billion years old
Our Sun is a Yellow star
Planetary Nebula A cloud of gas that forms around a sun-like star that is dying
Planetary Nebula the stage of a dying red giant star where all its gases have drifted away due to its weak gravity
Protostar The condensing and heating of hydrogen atoms and dust before the star is born. There is no nuclear fusion yet
Red Giant Outer parts expand, then the core shrinks. Turns red as it is cooling
Red Giant The star that has expanded and cooled, resulting in it becoming red. It has used up all the hydrogen in its core and is now using helium ass fuel
Red supergiant A star that has used up all the hydrogen, is using helium as fuel, creates heavy elements in its core ( up to iron) and has a mass much higher than the Sun
Solar Nebula Theory The Solar System developed out of an interstellar cloud of dust and gas
Stars begin as parts of a .... Nebula
Stars created... The first elements
Stars like our Sun will end their lives as what? Whit Dwarfs
Supernova As the core shrinks, pressure increases; results in explosin
Supernova An explosion produced when the core of a red supergiant collapses
T/F: Stars more massive than the Sun follow the same paths when leaving the main sequence. False
Weight How much gravity is pulling on an object
What does a neutron star mostly consist of? Neutrons
When do high-mass stars leave the main sequence? When there is no more hydrogen fuel in their core
Where were Hydrogen and helium formed? The Big Bang
White Dwarf Small blue white hot core; Faint glow from left over energy
White Dwarf A start that has collapsed from the red giant stage to become much hotter and denser than it was.