Tides

A:

An ebb tide occurs when a tidal current moves away from land. Tidal currents moving toward land are called floods. Ebbs and floods are categorized as reversing currents.

See Full Answer
Filed Under:
  • What are lunar tides?

    Q: What are lunar tides?

    A: According to Science and the Sea, lunar tides are the most common tides and are caused by the Moon's gravity. Although the Sun's gravity is stronger, it is farther from the Earth than the Moon, which is why lunar tides are more than two times stronger than solar tides.
    See Full Answer
    Filed Under:
  • How long does high tide last?

    Q: How long does high tide last?

    A: High tides are part of a cycle of rising or receding water that lasts for approximately 6 hours and 13 minutes. Low tides last for the same amount of time.
    See Full Answer
    Filed Under:
  • How are sea waves formed?

    Q: How are sea waves formed?

    A: Many factors impact the generation, severity, frequency and strength of ocean waves. One of the most important factors leading to the formation of an ocean wave is the wind. The shapes of the basins of the ocean dictate the ocean's regular movements and also affect waves.
    See Full Answer
    Filed Under:
  • How often do tides occur?

    Q: How often do tides occur?

    A: Ocean tides are caused by the gravitational pull of the Moon and Sun. Due to the rotation of the Earth, locations will experience two high and two low tides each day. An alignment of the Sun and Moon will result in more extreme tides, known as spring tides.
    See Full Answer
    Filed Under:
  • Q: What is a spring tide?

    A: A spring tide is the tide which occurs at the time of full moon and new moon. The difference between the highest and the lowest rise of tides is highly pronounced during spring tide, and hence it can be easily distinguished.
    See Full Answer
    Filed Under:
  • Q: What causes tides?

    A: Tides, which are rising and falling sea levels, are caused by the effects of gravitational forces of the moon and sun combined with the Earth's rotation. Tidal magnitudes are affected by shoreline shape, the shape of bodies of water and environmental factors.
    See Full Answer
    Filed Under:
  • What are the characteristics of all waves?

    Q: What are the characteristics of all waves?

    A: Characteristics that all waves have in common are wavelength, amplitude and frequency. Apart from these properties, different types of waves have a number of varying characteristics. A wave is defined as a repetitive disturbance traveling through a medium going from one location to another.
    See Full Answer
    Filed Under:
  • Why is the bottom layer of the ocean the coldest?

    Q: Why is the bottom layer of the ocean the coldest?

    A: The bottom layer of the ocean is the coldest because cold water has a higher density than warm water. The colder water sinks to the bottom of the ocean. This movement of water creates the ocean currents.
    See Full Answer
    Filed Under:
  • Q: What causes ocean tides?

    A: Tides, the periodic rise and fall in the levels of large bodies of water, are the product of gravitational forces. They result from the interaction of the Earth with both the sun and the moon, though the moon is the most significant influence year round.
    See Full Answer
    Filed Under:
  • Q: Is there a red tide in Siesta Key, Fla.?

    A: The beaches in Siesta Key, Fla. periodically experience red tide, a condition that occurs when high levels of red-tinted and harmful algae are present in the water. During red tides, the ocean water may display a reddish-brown hue.
    See Full Answer
    Filed Under:
  • Q: How are tidal waves formed?

    A: Tidal waves are caused by the gravitational fields of the sun, the moon and the earth. A tidal wave is a small, regularly occurring wave caused by the shifting of the tide.
    See Full Answer
    Filed Under:
  • Q: How often do spring tides occur?

    A: Spring tides occur twice a month during the full and new moons. Spring tides are the result of the alignment of the Sun, Moon and Earth and the effects of their gravitational forces. Spring tides are also high tides.
    See Full Answer
    Filed Under:
  • Q: What is the fetch of a wave?

    A: Fetch is the distance that wind has traveled over open water without encountering an obstruction. In normal circumstances, long fetches create larger, more powerful waves than short fetches.
    See Full Answer
    Filed Under:
  • Q: Why do waves break?

    A: Waves break when the back of the wave moves faster than the front of the wave, causing it to spill over. The shape of a breaking wave is dictated by the shape of the ocean floor below it, with gentle slopes causing a gentle spill on a cresting wave.
    See Full Answer
    Filed Under:
  • Q: Why do tides occur?

    A: Tides are caused by a combination of three factors: the moon's gravity, the sun's gravity and the earth's own gravity. The moon's gravity is the most significant of these forces; it exerts 2.2 times more force on the tides than the sun's gravity does.
    See Full Answer
    Filed Under:
  • Q: When does a high tide occur?

    A: High tide occurs on the side of the Earth that is opposite of the moon during orbit, while the side of the Earth closest to the moon experiences low tide. The gravitational pull of the Earth and moon causes high and low tide.
    See Full Answer
    Filed Under:
  • How does a tidal barrage work?

    Q: How does a tidal barrage work?

    A: Electricity is generated through the revolution of turbines installed in a dam built across a river. Turbines are designed to work for both the ebb and the flow directions. These turbines move due to tidal movements.
    See Full Answer
    Filed Under:
  • Q: What can you learn from tide tables?

    A: Tide tables can tell you when the water level will be at its highest and lowest at a particular location. Tide tables can also be used to predict the height of water at times between high and low tide.
    See Full Answer
    Filed Under:
  • Q: Who invented tidal energy?

    A: Tidal energy has been used since the early Middle Ages in Europe; no one person is credited with inventing it. The earliest record of communities using the power of waves to generate energy for paddlewheels dates from the 10th century.
    See Full Answer
    Filed Under:
  • Q: How do you interpret local tide tables?

    A: A local tide table displays the predicted times and heights of high and low tides. The height of the water is relative to a point called Mean Lower Low Water, which is the average height of the lowest tide during the recording period of a tidal station.
    See Full Answer
    Filed Under:
  • Q: What causes waves?

    A: Waves are caused by wind blowing on the ocean surface. Stronger winds cause larger waves. Variations in wind speed and duration determine the size and frequency of waves. The horizontal length of the wave is established by the horizontal distance between its two crests and the vertical length is established by the vertical distance between the crests. Large waves can also be created by undersea seismic activity.
    See Full Answer
    Filed Under:

Explore Weather & Tides