In our solar system, gas giants are much bigger than terrestrial planets, and they have thick atmospheres full of hydrogen and helium. On Jupiter and Saturn, hydrogen and helium make up most of the planet, while on Uranus and Neptune, the elements make up just the outer envelope.
The answer to this question is true
The smallest prefix is deci.
Answer: Swim bladders of fish at depth help maintain buoyancy by regulating gas levels.
