THE EXPANDING UNIVERSECH 15 SEC 5

GOAL/PURPOSEYOU LEARNED THAT GALAXIES ARE

CLUSTERS OF BILLIONS OF STARSYOU WILL NOW LEARN THE ROLE OF

GRAVITY IN FORMING AND MAINTAINING THE SHAPE OF OUR SOLAR SYSTEM

YOU WILL ALSO LEARN ABOUT THE BIG BANG THEORY AND HOW THE UNIVERSE HAS CHANGED OVER TIME

THE BIG BANGBIG BANG- THE PERIOD WHEN THE UNIVERSE

BEGAN.KEY- ACCORDING TO THE BIG BANG THEORY,

THE UNIVERSE FORMED IN AN INSTANT BILLIONS OF YEARS AGO, IN AN ENORMOUS EXPLOSION.

KEY- SINCE THE BIG BANG, THE SIZE OF THE UNIVERSE HAS BEEN INCREASING RAPIDLY AND IS BILLIONS OF TIMES LARGER THAN IT WAS IN IT’S EARLY HISTORY

HUBBLEKEY- IN THE 1920’S AN AMERICAN

ASTRONOMER , EDWIN HUBBLE, HELPED DEVELOP THE BIG BANG THEORY

HUBBLE’S LAW- STATES THAT THE FARTHER AWAY A GALAXY IS, THE FASTER IT IS MOVING AWAY FROM US.

KEY- THE HUBBLE TELESCOPE WAS NAMED AFTER HIM

https://www.google.com/search?q=HUBBLE+TE&client=firefox-a&hs=p0U&rls=org.mozilla:en-US:official&source=lnms&tbm=isch&sa=X&ei=_3nmUrLJA8fZoATd1YH4Dw&ved=0CAkQ_AUoAQ&biw=1067&bih=433&dpr=1.5

EXPANDINGKEY- THE UNIVERSE IS EXPANDING LIKE

RISING BREAD DOUGHKEY- BASED ON CAREFUL MEASUREMENTS

OF HOW FAST DISTANT GALAXIES ARE MOVING AWAY FROM US AND THE COSMIC BACKGROUND RADIATION, ASTRONOMERS ESTIMATE THAT THE UNIVERSE IS ABOUT 13.7 BILLION YEARS OLD

FORMATION OF SOLAR SYSTEM1. A CLOUD OF GAS AND DUST FORMED A

SPINNING DISC2. GAS IN THE CENTER OF THE DISC

COLLAPSED TO FORM THE SUN3. THE REMAINING GAS AND DUST FORMED

THE PLANETS4. THE SOLAR SYSTEM INCLUDES THE SUN,

PLANETS, AND BELTS OF ROCK, ICE AND DUST

http://www.brainpop.com/science/space/

Milky Way Spiral Galaxy

THE FUTUREKEY- NEW INFORMATION AND OBSERVATIONS

LEAD MANY ASTRONOMERS TO CONCLUDE THAT THE UNIVERSE WILL LIKELY EXPAND ………………………………….

http://www.youtube.com/watch?v=r0H6R7xRytkFOOOOOOORRRRRRRRRREEEEEEEEEEEEEEEE

EVVVVVVVVVVVVVVVVVEEEEEEEEEEEEEEEEEEEERRRRRRRRRRRRRRRRRRRRRRRRRRRRRR

DARK MATTER AND ENERGY DARK MATTER- IS THE MATTER THAT DOES NOT GIVE OFF

ANY ELECTROMAGNETIC RADIATION. KEY- DARK MATTER CANNOT BE DETECTED DIRECTLY. KEY- ITS PRESENCE CAN BE INFERRED BY OBSERVING THE

EFFECT OF ITS GRAVITY ON VISIBLE OBJECTS SUCH AS STARS OR ON LIGHT.

DARK ENERGY- IS CAUSING THE UNIVERSE EXPANSION TO ACCELERATE

KEY- MOST ASTRONOMERS THINK THAT THE UNIVERSE IS MADE UP OF MOSTLY DARK MATTER AND ENERGY

http://www.brainpop.com/science/space/darkmatter/

CHECK FOR UNDERSTANDING WRITE THE Q & AWHAT IS THE BIG BANG THEORY?WHEN DID THE BIG BANG OCCUR? WHAT

EVIDENCE IS THERE TO SUPPORT THE THEORY?HOW OLD IS THE SOLAR SYSTEM?WHAT IS DARK MATTER?WHAT EVIDENCE HAS LED SCIENTIST TO

PREDICT THAT THE UNIVERSE WILL EXPAND FOOOOOORRRREEEEEEEVERRRR?