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
How many planets are there in the Solar System?
8
9
10
Who first published the idea that the Sun is the centre of the Solar System?
Isaac Newton
Nicolas Copernicus
Ptolemy
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
How is weight affected by different planets?
Weight is the same on all planets
Weight is proportional to the gravitational field strength of the planet
On other planets, objects are weightless
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