Complete these sentences by matching the phrases below.

Scientists

recreate early

conditions of the

universe using

?

the Doppler effect

The speed of

stars can be

measured using

?

cosmic microwave

background radiation.

The prevailing

idea about the

beginning of the

universe is

called:

12

particle accelerators

The heat left

over from the

beginning of the

universe is:

the Big Bang theory

Ii