Fill in each gap with one suitable word from the box(there are two extra words).
| into-and-planets-universe-combined-explaining-time-were-to-that-electrons-matter |
A popular theory (1)......the evolution of the universe is known as the Big Bang Model.According to the model,at some time between ten(2)......twenty billion years ago,all present matter and energy(3)......compressed into a small ball only a few kilometers in diameter.It was,in effect,an atom(4)......contained in the form of pure anergy all of the components of the entire universe.Then,at a moment in(5)......that astronomers refer to as T=0,the ball exploded,hurling the energy(6)......space. Expansion occurred.As the energy cooled,most of it became(7)......in the form of protons,neutrons and(8)......These original particles(9)......to form hydrogen and helium,and continue to expand.Matter formed into galaxies with stars and(10)......
Fill in each gap with one suitable word from the box(there are two extra words).
A popular theory (1)..explaining....the evolution of the universe is known as the Big Bang Model.According to the model,at some time between ten(2)..and....twenty billion years ago,all present matter and energy(3)...were...compressed into a small ball only a few kilometers in diameter.It was,in effect,an atom(4)..that....contained in the form of pure anergy all of the components of the entire universe.Then,at a moment in(5)..time....that astronomers refer to as T=0,the ball exploded,hurling the energy(6)....into..space. Expansion occurred.As the energy cooled,most of it became(7)..matter....in the form of protons,neutrons and(8)...electrons...These original particles(9)....combined..to form hydrogen and helium,and continue to expand.Matter formed into galaxies with stars and(10)..planets...