changing with the tides

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Twice a month, when the Earth, Sun, and Moon line up, their gravitational power combines to make exceptionally high tides, called spring tides, as well as very low tides where the water has been displaced. When the Sun is at a right angle to the Moon, moderate tides, called neap tides, result. From our view on Earth, these tides coincide with certain lunar phases since they occur when the Moon reaches specific positions in its orbit. An illustration of the tidal force, viewed from Earth's North Pole. Water bulges toward the moon because of gravitational pull. Note: The moon is not actually this close to Earth.

Changing with the Tides | Book by Shelby Leigh | Official

As Earth rotates, the moon's gravity pulls on different parts of our planet. Even though the moon only has about 1/100th the mass of Earth, since it's so close to us, it has enough gravity to move things around. The moon's gravity even pulls on the land, but not enough for anyone to tell (unless they use special, really precise instruments).The low-tide zone (4) is only dry at the lowest tide. Nudibranchs, a type of sea slug, live in tide pools in the low-tide zone. Like the sea star, this animal is a carnivore. Nudibranchs eat sponges, barnacles and other nudibranchs. Nudibranchs can also eat sea anemones, because they are immune to its poisonous tentacles. When the moon's gravity pulls on the water in the oceans, however, someone's bound to notice. Water has a much easier time moving around, and the water wants to bulge in the direction of the moon. This is called the tidal force. While a tidal bore is a tidal wave, a tsunami is not. Tsunami is taken from the Japanese words for “harbor wave.” Tsunamis are caused not by tides, but by underwater earthquakes and volcanoes. Tsunamis are associated with tides because their reach surpasses the tidal range of an area.

Tides - Moon: NASA Science Tides - Moon: NASA Science

The tidal range along the Thames River has quadrupled since the time of the Romans, as engineers narrowed and deepened the river for navigation. Those tides rhythmically submerged and revealed the Rising Tide sculpture, underwater artist Jason deCaires Taylor’s 2015 installation at Vauxhall in London. In most tidal energy generators, turbines are put in tidal streams (1). A turbine is a machine that takes energy from a flow of fluid. That fluid can be air ( wind) or liquid (water). Because water is more dense than air, tidal energy is more powerful than wind energy. Placing turbines in tidal streams can be difficult, because the machine disrupts the tide it is trying to harness. However, once the turbines are in place, tidal energy is predictable and stable.Tides produce some interesting features in the ocean. Tides are also associated with features that have nothing to do with them.