How does the physical environment in a tide pool change between the tides

Between high tide and low tide, the physical environment of a tidepool changes dramatically.  Organisms in a tidepool are more exposed during hightide and less exposed during low tide.

Factors in the physical environment that change between high and low tide include:

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex