Big Bang Theory Flashcards
What is the Big Bang theory based on?
When universe was created and expanded to what it is now.
How astronomers explain universe began
What does Big Bang theory explain?
Explains evolution of universe from earliest known periods
Name the stages of Big Bang theory.
Big Bang, universe expands, matter created, protons + neutrons form, atoms form, stars appear, first galaxies, present
What is the Big Bang?
Universe begin in sudden, mysterious event. (Unknown how)
what is universe expands?
Expands in size. Rate of expansion then slows.
What is matter created?
Energy of newborn universe creates matter. Matter exists as particles.
What is protons + neutrons form?
Leftover particles begin to form protons + neutrons.
What is atoms form?
Earth now cool enough for atoms to form
What is stars appear?
Later, stars appear
What are the first galaxies?
Huge spinning collections of stars held together by gravity force
What is present?
Universe as it is - still expanding.
give a brief couple of sentences on the Big Bang theory.
universe began in sudden, mysterious event. It expanded in size.
Rate of expansion then slowed. Matter of universe is then created and leftover particles of matter begin to form protons and neutrons. Earth is now cool enough for atoms to form.
Later, stars appear. Huge spinning collections of stars held together by gravity force.
Now as present, universe is still expanding.
