Movement of the Moon and Occurrence of tide and ebb phenomenon

At night, when you look at the sky, you see the Moon. It is a satellite of the Earth. It is a dark body, but it seems bright because it reflects the sunlight that falls on its surface.

The Moon rotates around itself (its axis) every 28 days, and it rotates around the Earth every 28 days (the lunar month).

Moon’s rotation around the Earth

The Moon rotates around the Earth in a circular orbit every 28 days. The Moon appears in the lunar month (the Muslim calendar) in different phases.

When the Moon rotates around the Earth, the Moon area that reflects the sunlight changes to form the phases of the Moon.

So, the rotation of the Moon around the Earth causes the occurrence of the Moon phases during the lunar month.

We notice that the Moon phases begin with a crescent, half Moon (half of the Moon is shiny), full Moon, then the other part becomes shiny, and then changes into a crescent.

Moon phases

The Moon’s rotation around the Earth takes 28 days.

The solar year equals 365 and quarter days, but the lunar year equals 354 days. What is the reason that makes the Moon rotates around the Earth in a certain circular orbit?

Because there is an attraction force between the Moon, Earth, and the Sun.

Tide and ebb phenomenon

The water represents 71 % of the Earth’s surface, the tide and the ebb phenomenon occur in the water surfaces (the oceans, the seas and the lakes).

The tide and the ebb phenomenon occur due to the attraction force between the Moon, the Earth, and the Sun, but the Moon is more effective than the Sun as it is nearer to the Earth.

The tide is the rise of the water level on the water surfaces to cover the seashores. The maximum rise of the water level (tide) is in the middle of the lunar month (at the full moon phase), and the ebb is the return of the water to its normal level after the tide.

Benefits of the tide and the ebb 

1. We can generate electricity as the flow and the retraction of the water during the tide and the ebb produce the energy that is used in operating the turbines to produce the electricity.

2. The water currents result from the tide, and the ebb causes the water canals to remain deep.

3. They clean the coasts during the tide and the ebb; the water of the seas carries the wastes from the coasts to the bottom of the sea, where they are settled.

4. The water currents resulting from the tide and the ebb help the ships and the boats to move through the shallow water paths.

Bad effects of the tide and the ebb phenomenon 

 It causes some bad effects, such as the decay of the beaches.

FAQ about the Movement of the Moon

1. What is meant by the movement of the Moon?

The movement of the Moon refers to its continuous motion around the Earth in a path called an orbit. The Moon completes one orbit around the Earth approximately every 27.3 days, while also rotating on its axis. Because the Moon rotates at nearly the same rate as it revolves around Earth, we always see the same side of the Moon.

2. What causes the tides and ebb phenomenon?

Tides and ebb occur mainly due to the gravitational pull of the Moon on Earth’s oceans. The Moon’s gravity pulls water toward it, causing a rise in sea level (high tide). As Earth rotates, other areas experience low tide (ebb) when the water moves away.

3. What is the difference between tide and ebb?

• Tide (High Tide): The rise of the seawater level due to the gravitational attraction of the Moon and, to a lesser extent, the Sun.
• Ebb (Low Tide): The fall or lowering of the seawater level after the high tide passes.

These two processes occur regularly every day along coastlines.

4. How many tides occur each day?

Most coastal regions experience two high tides and two low tides every 24 hours and 50 minutes. This occurs because the Earth rotates while the Moon continues its orbit around the planet.

5. Does the Sun play a role in tides?

Yes. Although the Moon has the strongest effect, the Sun’s gravity also influences tides. When the Sun, Moon, and Earth align, stronger tides occur.

6. What are spring tides?

Spring tides occur when the Sun, Moon, and Earth are aligned during the full moon or new moon. This alignment causes very high tides and very low tides due to the combined gravitational forces.

7. What are neap tides?

Neap tides occur when the Sun and Moon form a right angle with Earth (during the first and third quarters of the Moon). In this case, tidal differences are smaller, resulting in moderate tides.

8. Why are tides important?

Tides are important because they:

• Help maintain marine ecosystems.
• Influence navigation and fishing activities.
• Assist in generating tidal energy.
• Help circulate nutrients in ocean waters.

9. How does the Moon’s movement affect tides?

As the Moon moves around the Earth, the area of strongest gravitational pull shifts across the planet. This movement causes the regular pattern of high and low tides in different locations.

10. Do tides occur only in oceans?

Tides are most noticeable in oceans and seas, but gravitational forces also slightly affect large lakes and even Earth’s crust, though these effects are usually too small to observe.

You can follow Science Online on YouTube from this link: Science Online
Earth’s rotation around the Sun and the sequence of the four seasons

The components of the Earth’s atmosphere and their importance

The types of solar eclipses and safety precautions on observing the solar eclipse

The lunar eclipse and safety precautions on observing the lunar eclipse