Which of these objects is a dwarf planet?
Mercury
Pluto
Jupiter
Which of the following is a natural satellite?
The Moon
The International Space Station
The Hubble Space Telescope
What shape are the orbits of comets?
Elliptical
Rectangular
Irregular
Which body was the first stage in the formation of the Sun?
A nebula
A protostar
A nova
What sort of reaction mainly happens in the Sun?
Nuclear fission
Nuclear fusion
Chemical
Where does the matter that makes up our Sun come from?
It comes directly from the Big Bang and started to form shortly after the Universe came into existence
It comes from the explosion of other massive stars and was pulled together by gravity to form the Sun
It comes from material that was originally in the asteroid belt and then got pulled in by gravity to form the Sun
Which of these statements best describes the main sequence stage of a star’s life?
The start of a star’s life as it is forming
The end of a star’s life when it explodes
The stable part of a star’s life where hydrogen is fused to helium and the forces are balanced
Why will the Sun not become a black hole at the end of its life?
It is too heavy – it has too much mass
It is not made of the correct material
It is not heavy enough – it does not have enough mass
What is the name of the explosion that a massive star undergoes once it has stopped being a supergiant?
A supernova
A gravitational collapse
Thermal expansion
What happens to the speed and velocity of a planet in a circular orbit? - Higher
The velocity changes and the speed changes
The velocity changes but the speed remains constant
The speed changes but the velocity remains constant