Tides

Surface Currents  

Tides

Waves

Deep Currents

Spring tides and neap tides

High tides and low tides

Full moon tides and new moon tides

First quarter tides and third quarter tides

neap tide

spring tide

new moon tide

full moon tide

full moon tide

new moon tide

neap tide

spring tide

During a new moon and full moon

During a first quarter moon and third quarter moon

When the Moon's gravity pulls on the Earth's ocean water

When the Moon is at right angles to the Sun and Earth

During a new moon and full moon

During a first quarter moon and third quarter moon

When the Moon's gravity pulls on the Earth's ocean water

When the Moon is at right angles to the Sun and Earth

The spring tide came early.

The water level rose due to the high tide.

The low tide receded and pulled the boat out to sea.

The gravitational pull of the sun and moon decreased the tidal range.

because winds are predictable

because the moon’s path is predictable

because ocean water density is predictable

because the sun’s movements are predictable

Neap Tide

Low Tide

High Tide

Spring Tide