Big Bang.

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Presentation transcript:

Big Bang

What is a theory?

Theories of Celestial Objects Geocentric “Earth” centered Thought everything revolved around the Earth Aristotle and Ptolemy Heliocentric “Sun” centered Everything revolves around the Sun…Earth and planets First suggested by Copernicus Confirmed by Galileo With the help of a telescope

19)The “Big Bang” is a theory of how the universe began. 21)The Big Bang Theory states that the universe formed about 10-15 billion years ago through a huge explosion.

22)The universe continues to expand rapidly. 28)The Big Bang Theory states the solar system is about 4.6 billion years old.

Review Big Bang Theory Theory on how the universe formed Happened about 10-15 billion years ago through a huge explosion Says the universe expanded from a size smaller than a speck of dust to its current size!

The Solar System

Review Geocentric means Heliocentric means Everything revolves around the Earth Heliocentric means Everything revolves around the Sun T/F Scientists think the solar system was once smaller than a speck of dust. TRUE! Then the Big Bang happened!