Land will warm faster/quicker
There are two types of rocks that make up the continental crust "sedimentary and metamorphic rocks." Sedimentary rocks are formed with pressure and compaction, and metamorphic rocks are made with heat and pressure. The earth's crust itself is made up of sedimentary rocks because they are mainly found a little under earths crust same goes with metamorphic rocks.
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Water, because electrolysis is using electricity to break the bond of water to release 2 Hydrogens and the 1 Oxygen.