Not by a long shot. Both Earth and Venus are approximately 2x the size of Mars. Many other planets are also many times larger than Mars (Jupiter, Saturn, Neptun, Uranus).
It is 7th. (Strictly speaking you should say most massive, not heaviest.)
Mars is the heaviest planet. Mercury is the third heaviest. Mars has an iron core that's the same as Earths except that Mars has a greater consistent Iron layout. Mercury is made primarily of iron and has a very low gravity due to its lack of size. Mars Earth Mercury Pluto(no longer a planet by classification) Jupiter * Saturn * Neptune * Uranus * Venus * All of the * Planets are gas based planets and would float in a pool of water if you could figure out how to do such a thing.
yes it is the heaviest planet
Jupiter is the biggest and heaviest planet.
The tarantula is the largest, heaviest spider on the plant.
Yes
Mars is an inner planet.
The four inner, rocky planets are also known as the terrestrial planets. These are; Mercury, Venus, Earth and Mars. Of these four, the largest and the most massive is the Earth.
In our solar system, the largest planet, Jupiter, is indeed also the heaviest, weighing in at about 317 times the mass of Earth. However, a larger planet isn't necessarily a heavier one - for example, Uranus is larger but less massive than Neptune.
Mars IS a rocky planet
Planet mars was named after the god of war mars.
Yes mars is an important planet because it is a planet.