There are two high tides and two low tides in each 25-hour period because: Group of answer choices Earth completes a full rotation every 24 hours, but the Moon moves too. Earth orbits around the Sun in a little over 24 hours. the Moon orbits Earth in 25 hours. heating and cooling of the seas occur twice each day.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to