THE UNIVERSE

Due to the large number of galaxies, the universe is .............

• crowded

• empty

• half filled

• almost filled

The distances between celestial bodies are ...........

• huge

• small

• not so big

• zero

It's preferred to use ...................... as a unit in measuring distances in the universe.

• kilometer

• meter

• light year

• year

The ................. is the accepted theory nowadays for the explanation of the origin of the universe.

• Nebular assumption

• Modern theory

• Universal gravitational theory

• Big bang

The universe size is ................. as time passes.

• increasing

• decreasing

• constant

The solar system is part of ................. galaxy.

• satellite dwarf

• Andromeda

• Milky way

• Black eye