Mars is the only planet which is both smaller and colder than the Earth.
It is a rocky planet that is much smaller and colder than earth.
It is a rocky planet but smaller and colder than the earth
It's a rocky planet, but is much smaller than earth and colder.
colder because its an outer planet and earth is an inner.So remember inner=hotter outer=colder
Eris is not a planet; it is a dwarf planet. It is much smaller than Earth.
Eris is not a planet; it is a dwarf planet. It is much smaller than Earth.
Pluto is the dwarf planet that is smaller than the Earth's moon.
Mars.
Neptune's temperature is around 72 degrees Kelvin, which is about 200 degrees colder than the Earth. Neptune is far further from the sun and as such is a much colder planet than earth.
It's colder - due to it being much further away from the Sun than we are.
Smaller.
The Moon is smaller than Earth, so logically it will contain less matter and therefore will be colder.