Gas giants are much bigger, are more distant from the sun, and are composed mostly of gas (particularly methane and ammonia) whereas the terrestrial planets are composed mostly of rock and metal, are closer to the sun, and are smaller.
why
gas giants are composed of gas while terrestrial planets are composed of solid matter
Terrestrial planets have terra firma, a.k.a. hard ground. The gas giants are giant balls of gas.
All terrestrial planets are able to maintain life, but the gas giants cannot.
gas giants
== ==
The Terrestrial Planets are Mercury, Venus, Earth, and Mars. The Gas Giants are Saturn, Jupiter, Uranus, and Neptune.
The Asteroid Belt is a demarcation between the gas giants and terrestrial type planets.
Terrestrial planets contain much more of the heavy elements (such as iron and silicon) and less of the lighter elements (such as hydrogen and helium). Terrestrial planets are smaller and denser, and are also closer to the sun, and hence warmer as well. Gas giants are distant and cold.
Gases .
Bigger planets are more likely to be gas giants while smaller ones are more likely to be terrestrial. This of course is not the answer to your question which is, of all planets that may exist, is there a greater likelyhood of there being terrestrial planets or gas giants?
terrestrial... there made of rock and considerably smaller than the gas giants jupiter and saturn