Understanding Tides for Grade 9

Front

Tides

Back

Periodic rise and fall of sea levels

Front

Gravitational Pull

Back

Main cause of tides, due to Moon and Sun

Front

High Tide

Back

Water level at its highest point

Front

Low Tide

Back

Water level at its lowest point

Front

Spring Tide

Back

Occurs during full and new moons, higher high tides

Front

Neap Tide

Back

Occurs during quarter moons, lower high tides

Front

Tidal Range

Back

Difference between high tide and low tide

Front

Semidiurnal Tide

Back

Two high and two low tides each day

Front

Diurnal Tide

Back

One high and one low tide each day

Front

Bay of Fundy

Back

Example of extreme tidal range