How The Universe Works Worksheet Page 3

7. A toms c ould n ot f orm u ntil a fter t he u niverse w as o ne s econd o ld. T he f irst

element t o f orm w as _ ____________________. D uring t he f irst t hree m inutes o f

the u niverse’s e xistence, t he e lements _ _________________ a nd

________________ a lso f ormed.

8. W hen a stronomers s ay t hat t he u niverse b ecame t ransparent 3 80,000 y ears

after t he B ig B ang, w hat d o t hey m ean?

9. T he C OBE a nd W MAP s pace o bservatories m apped t he t emperature o f t he e arly

universe. H ow w ould t he p resent u niverse b e d ifferent i f t here w ere n o

temperature v ariations i n t he e arly u niverse?

10. T he f irst s tars f ormed _ ________ m illion y ears a fter t he B ig B ang a nd t he f irst

galaxies f ormed _ ________ b illion y ears a fter t he B ig B ang.

11. T he e xpansion o f t he u niverse i s a ccelerating b ecause o f _ _________________

______________.

12. D escribe h ow t he u niverse w ill l ook 1 00 b illion y ears f rom n ow.

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