Tides

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Questions and Answers

What causes high tides?

  • Strong winds
  • Full moon (correct)
  • High temperatures
  • Low atmospheric pressure

Which of the following factors affect the tides?

  • Wind speed
  • Moon phases (correct)
  • Rainfall
  • Temperature

What is the average duration of a tidal cycle?

  • 72 hours
  • 48 hours
  • 12 hours
  • 24 hours (correct)

Match the following tides related terms with their correct definitions:

<p>Tides = The rise and fall of sea levels caused by the gravitational forces between the Earth, Moon, and Sun High Tides = The state of the tide when at its highest level Low Tides = The state of the tide when at its lowest level Tidal Cycle = The time it takes for a tide to go from high to low and then back to high again</p> Signup and view all the answers

Match the following factors with their effect on tides:

<p>Moon = The primary factor that causes tides on Earth Sun = The secondary factor that also contributes to tides on Earth Gravitational Forces = The forces that cause the water on Earth to bulge out in the direction of the Moon Rotation of the Earth = The factor that causes two high tides and two low tides every lunar day</p> Signup and view all the answers

Match the following tidal patterns with their descriptions:

<p>Diurnal Tides = A tidal pattern with one high tide and one low tide each lunar day Semi-diurnal Tides = A tidal pattern with two high tides and two low tides each lunar day Mixed Tides = A tidal pattern with varying high and low tides each lunar day Spring Tides = A type of tide that occurs when the Sun, Moon, and Earth are nearly aligned, resulting in the greatest tidal range</p> Signup and view all the answers

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Study Notes

Tides

  • High tides are caused by the gravitational pull of the Moon and the Sun on the Earth's oceans.

Factors Affecting Tides

  • The gravitational pull of the Moon and the Sun
  • The Earth's rotation
  • The shape and size of the ocean basins
  • Wind and atmospheric pressure

Tidal Cycle

  • The average duration of a tidal cycle is 24 hours and 50 minutes.
  • Spring Tide: a tide with the greatest difference between high and low water levels, occurring when the Moon and Sun are aligned.
  • Neap Tide: a tide with the least difference between high and low water levels, occurring when the Moon and Sun are at right angles to each other.

Factors and Their Effects on Tides

  • Gravitational Pull of the Moon: causes the ocean water to bulge, resulting in high tides
  • Gravitational Pull of the Sun: enhances or cancels out the effect of the Moon's gravitational pull, depending on their alignment
  • Earth's Rotation: causes the tidal bulge to move around the Earth, resulting in high and low tides

Tidal Patterns and Descriptions

  • Diurnal Tide: a tidal pattern with one high and one low tide per day
  • Semidiurnal Tide: a tidal pattern with two high and two low tides per day

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