Geography Give geographical resons.

(ii) When a place (meridian) faces the moon the gravitational force of the moon exceeds the centrifugal force of the earth leading to high tide here as the water is pulled towards the moon.

(iii) At the same time the place on the earth located at the opposite meridian to the place experiencing high tide, the centrifugal force of the earth exceeds the gravitational force of the moon. Thus, the water is pulled in the direction away from the moon leading to high tide.

(iv) The water required for the high tide moves in from places that are at right angles to those having high tides causing a low tide at those places.

(v) Thus, place located on the opposite meridian to the place experiencing high or low tide will also experience high or low tide respectively.

(ii) This leads to accumulation of sea water over a long period of time leading to formation of swamps & marshes.

(iii) The tides help in maintaining the mangroves and the coastal biodiversity here.

(iv) Certain areas near the sea coast being low lying & waters being shallow also lead to sediment deposition by sea waves leading to formation of lagoons.

(v) In this way, at some places along the coast, the low lying areas turn into lagoons or marshy lands.

• The gravitational pull of the moon and the sun as well as that of the earth is one of the factor responsible for occurrence of tides.
• But compared to the sun, the moon is closer to the earth.
• Due to this the gravitational force of the moon becomes more effective than that of the sun.
• Therefore, tides are influenced more by the moon than the sun.

• While revolving around the earth, the moon makes a right angle with respect to the earth and the sun.
• This position occurs on the first and the third quarter of each month.
• On both these days, the forces of both the sun and the moon operate at right angles on the earth.
• The attraction of the sun and the moon are not complementary but at right angles to each other.
• Due to this, the water level rise is less than usual at the time of high tide

• On new moon and full moon days, the gravitational pull of the sun and the moon act in the same direction.
• Due to this, the total pull increases.
• Hence, the tide on these days is much higher than the average high tide.

• Due to the earths rotation, it gets a type of power or force
• The force acting in the centre is centrifugal force.
• Due to this force any object on the earth would be thrown into the space.
• But the gravitational force is working towards the centre of the earth at the same time.
• This force is greater than the centrifugal force.
• Hence, any object on the surface of earth remains at the place where it exists.