Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth.

While tides are usually the largest source of short-term sea-level fluctuations, sea levels are also subject to forces such as wind and barometric pressure changes, resulting in strom surges, especially in shallow seas and near coasts. Tidal phenomena are not limited to the oceans, but can occur in other systems whenever a gravitational field that varies in time and space is present. For example, the shape of the solid part of the Earth is affected slightly by Earth tide, though this is not as easily seen as the water tidal movements. This links to the previous contextual studies I have engaged with and the fact of seeing past our reality at things that cannot be seen.

Tide changes proceed via the following stages:

• Sea level rises over several hours, covering the inertidal zone; flood tide.
• The water rises to its highest level, reaching high tide.
• Sea level falls over several hours, revealing the intertidal zone; ebb tide.
• The water stops falling, reaching low tide.

I decided to do this research as a result of Michael Marten sea change project as i wanted to gain a scientific understanding of the tidal movement. As well as this scientific approach I will look into the spiritual approach that this sea change could be viewed as and I will try to display these ideas in my work. Perhaps with a scientific approach it could be interesting to add text into the images that display the height of water, time of day and weather types too.