chapter 2 Flashcards
what is the universe
extremely hot and dense
what already existed tin the universe before the Big Bang
energy
when did the big bang explosion happen
14 billion years ago
what does the big bag involve all of
space
as matter moves away it does what
begins to cool to form matter
what formed first electron and quarks or protons and neutrons
electrons and quarks
two pieces of evidence that the Big Bang really happened
redshift of galaxies and cps,oc ,ocrpwave background radiation
cosmic microwave background radiation
faint radio signals ( left over from the Big Bang) coming from all directions of the universe
what formed 3 mins after the big bang
neutrons and protons combine to make atomic nuclei
380,000 years latter what formed
electrons and atomic nuclei combine to form an atom
how old is the universe
13.8 billion years
what is the universe doing
expanding
what does Hubbles law State
that galaxies are moving away from us at the speed that is proportional to their distance
when a galaxy is farther away from us is it moving faster or slower
faster because it is farther away
CMBR
leftover radiation from the Big Bang theory
what is the innermost layer of the sun is what
the core
in the core what happens
hydrogen fuses helium and form gamma rays and neutrinos
solar envelope
cooler than the core
sunspots
dark spots on the photosphere typically the same diameter as the earth
corona
the outermost layer of the sun
when is the corona only visible
during eclipses
solar flares
sparks of energy that that can reach the size of the earth
what is a nebula
made up of dust and gas and a hydrogen and helium
1st step in how our solar system formed
Nebula came over in a spiral over the milky way galaxy… because of gravity it contracted and collapsed on itself
2nd step
density and pressure increased and the atoms separated and jostled each other creating heat
3rd step
they became so hot that the atoms began to fuse creating nuclear FUSION
4th step
through condemnation and accretion the atoms and molecules began to stick together and formed larger particles
5th step
then by gentile collision some grains built up into balls and then into objects in a mile in diameter called planetismals
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