At their centers, all the jovian planets have cores made of:
new elements produced by the high pressure; elements which we do not have on Earth
hydrogen and helium in the form of gas
a solid mixture of rocky and icy materials under great pressure
methane, ammonia, and sulfur compounds
hydrogen and helium in the form of liquids

Respuesta :

Answer:

The core of Jupiter and Saturn is made up of rock,metal and hydrogen compounds, while the core of Uranus and Neptune is made up of rock,metals,water, methane, and ammonia.

Explanation:

The Jovian planets include, Jupiter, Saturn, Uranus, and Neptune. These planets when compared to terrestrial planets are small, with dense cores and surrounded by layers of gas.