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What is the tide? Tides are the rise and fall of sea levels caused by the joint effect of the Moon and Sun's gravitational forces, as well as the Earth's rotation. Tides are one of the most predictable natural phenomena on the planet. As the sun rises in the east and the stars appear at night, we are confident that the ocean waters will rise and fall along our shores on a regular basis. Tides are very long-period waves that move through the ocean in response to the moon and sun's forces. Tides form in the ocean and travel to the coast, where they manifest as the regular rise and fall of the sea surface. Let's speak about low tides. Low tide is the opposite of high tide. Low tide occurs when the wave reaches its lowest point, or its trough. The tidal range is defined as the height difference between high and low tide. It occurs when the sea level is at its lowest.The Moon's gravitational force has a massive effect High tide occurs when the highest part of the wave, or its crest, reaches a specific location; low tide occurs when the lowest part of the wave, or its trough, reaches that location. Speaking of tides,What are they The moon’s gravitational pull on the Earth and the Earth’s rotational force are the two main factors that cause high and low tides. The side of the Earth closest to the Moon experiences the Moon’s pull the strongest, and this causes the seas to rise, creating high tides. On the side facing away from the Moon, the rotational force of the Earth is stronger than the Moon’s gravitational pull. The rotational force causes water to pile up as the water tries to resist that force, so high tides form on this side, too. Elsewhere on the Earth, the ocean recedes, producing low tides. The gravitational attraction of the Sun also plays a small role in the formation of tides. Tides move around the Earth as bulges in the ocean.