they are farther from the sun and most of their atmosphere is nitrogen and methane and the are smaller and have a denser core than both saturn and juipter
Trench<span>: very deep, elongated cavity bordering a continent or an island arc; it forms when one tectonic plate slides beneath another.
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Ridge<span>: underwater mountain range that criss-crosses the </span>oceans<span> and is formed by rising magma in a zone where two plates are moving apart.</span>
The more molecules move the more kinetic energy they have. I hope that helped
