I think it's Pumice
Soil heats up and cools down the fastest. Water heats up regulary and does not cool down for a while. Sand heats up the slowest and cools down the slowest.
by air
Through water
stone
skulks
grass
A convection current is created when a heated material continually rises, cools and sinks. Plate tectonics are driven by this type of motion,
A convection current is created when a heated material continually rises, cools and sinks. Plate tectonics are driven by this type of motion,
Ingenious rocks form when molten material under the earths surface cools. Not only does the molten cool it does not harden.
A convection current is created when a heated material continually rises, cools and sinks. Plate tectonics are driven by this type of motion,
Lava.