The Universe

The apparent slow motion of the stars that is observed during the night is due to

• the orbit of stars around other stars

• the orbit of the Earth around the sun

• the effect of parallax

• the rotation of the Earth

A galaxy is

• a cloud of dust and gas

• a group of stars

• an exploding star

• a group of planets

Energy is emitted from the sun as a result of

• chemical reactions

• nuclear fusion

• nuclear fission

• the burning of hydrogen

The 'big bang' theory is a possible explanation of

• the birth of a star

• the expansion of the universe

• the collapse of the universe

• the formation of the solar system

A light year is a unit of

• brightness

• distance

• speed

• time

A nebula is

• a cloud of dust and gas

• a group of stars

• an exploding star

• a fixed pattern of stars

In the sun, hydrogen is transformed into

• carbon dioxide

• helium

• oxygen

• water

Which of the following is described as a nursery of the stars?

• nebula

• nova

• red giant

• white dwarf

The colour of a star is most directly related to its

• age

• location

• surface temperature

• volume

A supernova is the name given to

• the beginnings of a brand new star

• the core of an exploded star

• the end stage of a very massive star

• the end stage of a very small star