1. Where it all Began
Scientists believe that the universe started from a PRIMEVAL ATOM
The Primeval atom was a very hot and very dense mass of energy

2. It was made up of metals, gases, and dust

3. One day…

4. All the pieces scattered and formed different things in our universe

5. The Big Bang Theory
The Big Bang Theory is the theory that explains how the universe was formed
It states that the universe was created when the primeval atom expanded and exploded

6. Proof for the Big Bang The galaxies are really far apart
the distance between galaxies is still expanding
So this bang is probably still happening and creating new galaxies and other things in our universe

7. Starter What is the geocentric theory?
What is the heliocentric theory?
How are they different?
Which theory is actually correct?

8. Two Answers or Theories
Heliocentric
2. Geocentric

9. Geocentric
Geo = Earth

10. Geocentric = “Earth Centered”
It means that the Earth is in the center of the universe

11. Heliocentric
Helio = sun

12. Heliocentric = “sun centered”
It means that the sun is in the center of the Universe

14. PRACTICE Scientist believe that the universe is Shrinking Constant
Expanding
None of the above

15. 2. The theory that the universe began with a tremendous explosion is called……
3. The universe is believed to have started from a ____________

16. 4. What was the Primeval atom made up of?
5. Given the conditions of the primeval atom, is it possible for anything to live in the atom? Explain your answer

17. Classify the Following as Heliocentric or Geocentric.
Sun
Earth
Sun centered
Earth centered
Theory of what is the middle of the universe

18. How are the geocentric and heliocentric views different?

19. Ptolemy
Believed that the earth was at the center of the universe

20. Copernicus
Believed the sun was at the center of the universe

21. Kepler
Believed that the planets did revolve around the earth but not in a perfect circle.
The sun was not at the exact center

22. Galileo
First person to use a telescope to look at the stars, planets, universe and so on.
This gave him proof that he believed the sun was in the middle

23. Newton
Believed sun was in the center of the universe but gravity is what holds everything together in place

24. Practice
Classify the following famous as either Heliocentric believers or geocentric believers
Copernicus
Ptolemy
Galileo
Newton
Kepler