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13. MOVEMENTS OF OCEAN WATER

Ocean water movement is influenced by physical characteristics such as temperature, salinity, and external forces like wind and gravitational pulls from celestial bodies. The movements are categorized into horizontal motions like currents and waves, and vertical motions like tides. Understanding these movements is essential for navigation and ecological health.

Sections

  • 13

    Movements Of Ocean Water

    This section discusses the dynamic movements of ocean water, including ocean currents, waves, and tides, focusing on how various factors influence them.

    Learning Practice

  • 13.1

    Waves

    This section discusses the dynamic movements of ocean water, focusing on waves, their characteristics, formation, and the effects of tides on ocean levels.

    Learning Practice

  • 13.2

    Tides

    Tides are periodic rises and falls of sea level caused primarily by the gravitational pull of the moon and sun.

    Learning Practice

  • 13.2.1

    Tides Of Bay Of Fundy, Canada

    The Bay of Fundy in Canada experiences the highest tides in the world, influenced primarily by the gravitational pull of the moon and sun.

    Learning Practice

  • 13.2.2

    Types Of Tides

    This section discusses the different types of tides based on their frequency and the positions of the Sun and Moon.

    Learning Practice

  • 13.2.2.1

    Tides Based On Frequency

    The section discusses the types of tides based on their frequency of occurrence, including semi-diurnal, diurnal, and mixed tides.

    Learning Practice

  • 13.2.2.1.1

    Semi-Diurnal Tide

    Semi-diurnal tides are characterized by two high and two low tides every lunar day, with successive tides having similar heights.

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  • 13.2.2.1.2

    Diurnal Tide

    Diurnal tides consist of a single high and low tide occurring each day, primarily influenced by the gravitational forces of the moon and to a lesser extent by the sun.

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  • 13.2.2.1.3

    Mixed Tide

    Mixed tides are characterized by variations in height, typically occurring along the west coast of North America and many Pacific islands.

    Learning Practice

  • 13.2.2.2

    Tides Based On The Sun, Moon And Earth Positions

    Tides are the periodic rise and fall of sea levels caused by the gravitational forces of the sun and moon on Earth.

    Learning

  • 13.2.2.2.1

    Spring Tides

    The alignment of the sun, moon, and Earth in a straight line causes higher tides, known as spring tides, which occur twice monthly during full and new moon phases.

    Learning Practice

  • 13.2.2.2.2

    Neap Tides

    Neap tides occur when the sun and moon are at right angles to each other, resulting in lower tidal ranges compared to spring tides.

    Learning Practice

  • 13.2.3

    Importance Of Tides

    Tides are crucial ocean phenomena driven mainly by the gravitational pull of the moon and the sun, leading to predictable patterns that significantly affect navigation, coastal ecosystems, and even energy generation.

    Learning Practice

  • 13.3

    Ocean Currents

    Ocean currents are dynamic movements of water influenced by primary and secondary forces, affecting temperatures and ecosystem dynamics.

    Learning Practice

  • 13.3.1

    Types Of Ocean Currents

    Ocean currents are continuous flows of water within the ocean, influenced by various forces and classified based on depth and temperature.

    Learning Practice

  • 13.3.1.1

    Major Ocean Currents

    This section explores the dynamics of ocean currents, their causes, types, effects, and their distinctions from waves and tides.

    Learning Practice

  • 13.3.1.2

    Effects Of Ocean Currents

    Ocean currents influence oceanic climates, marine biodiversity, and human activities, driven by physical forces such as wind and solar energy.

    Learning Practice

  • 13.4

    Exercises

    This section covers various exercises to enhance understanding of ocean movements, including waves and tides.

    Learning Practice

References

NCERT Study Material

Class Notes

Memorization

What we have learnt

  • Ocean water movements are c...
  • Waves are energy waves rath...
  • Tides are caused by the gra...

Final Test

Revision Tests

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