The Big Bang
 How did it all start?
Learning Objectives



I can describe the Big Bang

I can describe the evidence for the Big Bang
Recap from Last Lesson


 The Universe is expanding!

 We can see that because the galaxies are
 moving apart

 What can t...
What is Science??


Science takes observations and tries to
explain them

Science makes predictions

Science deals with “h...
Before the Big Bang


Until the 1960s, most scientists believed in
The Steady State theory

  This was the idea that the g...
Cosmic
    Background
     Radiation
Two telephone technicians had
      made a microwave
    communication system
There w...
Interference
Bird poo
Nobel Prize for Physics
No one could explain this background
radiation with the Steady State Theory

The radiation might be left over from a huge
...
If the universe were created in a Big Bang
then we can make predictions

  The intense radiation would have got
  stretche...
Cosmic Background Microwave Radiation
Cosmic Background Microwave Radiation
Cosmic Background Microwave Radiation
Upcoming SlideShare
Loading in …5
×

Cosmic Background Microwave Radiation

1,490 views

Published on

• I can describe the Big Bang
• I can describe the evidence for the Big Bang

Published in: Education, Technology
  • Be the first to comment

Cosmic Background Microwave Radiation

  1. 1. The Big Bang How did it all start?
  2. 2. Learning Objectives I can describe the Big Bang I can describe the evidence for the Big Bang
  3. 3. Recap from Last Lesson The Universe is expanding! We can see that because the galaxies are moving apart What can that mean?
  4. 4. What is Science?? Science takes observations and tries to explain them Science makes predictions Science deals with “how” and not “why”
  5. 5. Before the Big Bang Until the 1960s, most scientists believed in The Steady State theory This was the idea that the galaxies were being pushed apart by matter leaking into the Universe through holes.
  6. 6. Cosmic Background Radiation Two telephone technicians had made a microwave communication system There was interference in the signal
  7. 7. Interference
  8. 8. Bird poo
  9. 9. Nobel Prize for Physics
  10. 10. No one could explain this background radiation with the Steady State Theory The radiation might be left over from a huge explosion a long time ago (it’s a bit like being able to feel the flame throwers at a Slipknot concert from the side of the stage)
  11. 11. If the universe were created in a Big Bang then we can make predictions The intense radiation would have got stretched into microwave frequencies by the expansion of the universe The radiation would be more or less the same everywhere you looked Outer space would be several degrees above “absolute zero”

×