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 of the following is not a part of the Solar System?
The Milky Way
The Sun
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
What is a comet?
An object that orbits the Earth, made from rocky material, dust and ice
An object that orbits the Sun, made from rocky material and metals
An object that orbits the Sun, made from rocky material, dust and ice
What happens to the gravitational force of attraction between two objects if the distance between them increases?
The force of attraction increases
The force of attraction decreases
The force of attraction remains constant
Which statement about polar orbits is correct?
They are lower than a typical geostationary orbit
One orbit takes longer than for a typical geostationary orbit
They are higher than a typical geostationary orbit
What happens to the speed and velocity of a planet in a circular orbit?
The velocity changes and the speed changes
The velocity changes but the speed remains constant
The speed changes but the velocity remains constant