- Physical Sciences
a process that takes energy into the system. This increases the internal energy of the system (increases the enthalpy of the system).
organisms that use dead organic material as a food source and thus recycles them.
a molecule containing anything from thousands to hundreds of millions of atoms per molecule, a...
the ordered three-dimensional arrangement of the particles of a crystal in an ionic bond or...
the distance between the centres (nuclei) of atoms joined in a bond.