The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten ... the pressure is so high the iron cannot melt. The iron isn't pure—scientists believe ...

After melting, the water molecules are closer together than ... If enough energy is added, the solid melts to a liquid and the liquid evaporates to a gas. As energy is removed, the motion of the ...

A mixture of iron filings and sulfur powder could be separated in exactly the same way. A beaker containing a mixture of insoluble solid and liquid ... its own particular melting point and ...