According to Oklahoma Edition of McDougal Littell Science Grade 7 the Terrestrial Planet that has the oldest least changing surface is Mercury. Mars has wind that carries sand that changes its surface. Venus has volcanoes and tectonic plates that change its surface. We know that Earth has erosion, volcanoes and tectonic plates that change the surface. This leaves Mercury.
EArth
All the planets are roughly the same age. We would have to visit each planet and study it to find out which is actually the oldest.
simultaneousthere is nothing called as the oldest planet all planets were more or less formed simultaneously. ActuallyNo we dont know
I think it is Jupiter because it really massive.
The Sun isn't a planet, it's a star. Without having energy from the Sun there can be no life on any planet. It is incorrect to say that the Sun was the "first or oldest planet" because it is most likely that the planets were formed during the same era of time as when the Sun itself was created.
EArth
Because Mercury is nearest to the sun, which gives more heat and gravitational pull. It is also the smallest and second-densest and has the greatest day and night temperature variations. It also has the oldest surface. Besides earth, it is the only terrestrial (rock like; not a gas planet) planet that has a global internal magnetic field.
your heart
Lichens were a component of the early terrestrial ecosystems, and the estimated age of the oldest terrestrial lichen fossil is 400 Ma.
The oldest dwarf planet is Ceres. See related links for more information.
Oldest unanswered questions keep on changing.
Devonian Period
Matt
Egypt(:
maine
usa
EARTH