Class 11 Geography: Movements of Ocean Water — Chapter Question Set

(a) tide — This is the textbook-supported choice for the question.

(a) As result of the moon and the sun pulling the earth gravitationally
in the same direction. — This is the textbook-supported choice for the question.

(b) Perigee — This is the textbook-supported choice for the question.

(d) January — This is the textbook-supported choice for the question.

a) dynamic — The textbook states: MOVEMENTS OF OCEAN WATER T he ocean water is dynamic.

d) movement of ocean water — The textbook states: Its physical characteristics like temperature, salinity, density and the external forces like of the sun, moon and the winds influence the movement of ocean water.

c) common in ocean water bodies — The textbook states: The horizontal and vertical motions are common in ocean water bodies.

b) the ocean currents and waves — The textbook states: The horizontal motion refers to the ocean currents and waves.

a) the continuous flow of huge amount of water i — The textbook states: Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water.

d) wave trains move ahead — The textbook states: Water moves ahead from one place to another through ocean currents while the water in the waves does not move, but the wave trains move ahead.

c) the rise and fall of water in the oceans and — The textbook states: The vertical motion refers to the rise and fall of water in the oceans and seas.

b) raised up and falls down twice a day — The textbook states: Due to attraction of the sun and the moon, the ocean water is raised up and falls down twice a day.

a) also forms of vertical motion of ocean water — The textbook states: The upwelling of cold water from subsurface and the sinking of surface water are also forms of vertical motion of ocean water.

d) actually the ener gy — The textbook states: WAVES Waves are actually the ener gy, not the water as such, which moves across the ocean surface.

c) as a wave passes — The textbook states: Water particles only travel in a small circle as a wave passes.

b) released on shorelines — The textbook states: Wind causes waves to travel in the ocean and the energy is released on shorelines.

a) water of the oceans — The textbook states: The motion of the surface water seldom affects the stagnant deep bottom water of the oceans.

d) beach, it slows down — The textbook states: As a wave approaches the beach, it slows down.

c) due to the friction occurring between the dyn — The textbook states: This is due to the friction occurring between the dynamic water and the sea floor.

b) less than half the wavelength of the wave — The textbook states: And, when the depth of water is less than half the wavelength of the wave, the wave breaks.

a) energy from the wind — The textbook states: Waves continue to gr ow larger as they move and absorb energy from the wind.

d) in the breaking waves — The textbook states: When a br eeze of two knots or less blows over calm water , small ripples form and grow as the wind speed increases until white caps appear in the breaking waves.

c) and dissolving as surf — The textbook states: Waves may travel thousands of km before rolling ashore, breaking and dissolving as surf.

b) fairly young ones and are probably formed by — The textbook states: Steep waves are fairly young ones and are probably formed by local wind.

a) possibly from another hemisphere — The textbook states: Slow and steady waves originate from far away places, possibly from another hemisphere.

d) determined by the strength of the wind — The textbook states: The maximum wave height is determined by the strength of the wind, i.e.

c) in a single direction — The textbook states: how long it blows and the area over which it blows in a single direction.

b) of the waves downward — The textbook states: Waves travel because wind pushes the water body in its course while gravity pulls the crests of the waves downward.

a) circular — The textbook states: The actual motion of the water beneath the waves is circular.

d) carried up and forward as the wave approaches — The textbook states: It indicates that things are carried up and forward as the wave approaches, and down and back as it passes.

c) Waves Wave — The textbook states: Characteristics of Waves Wave crest and trough : The highest and lowest points of a wave are called the crest and trough respectively.

b) the vertical distance from the bottom of a tr — The textbook states: Wave height : It is the vertical distance from the bottom of a trough to the top of a crest of a wave.

a) merely the time interval between two successi — The textbook states: Wave period : It is merely the time interval between two successive wave crests or troughs as they pass a fixed point.

d) the horizontal distance between two successiv — The textbook states: Wavelength : It is the horizontal distance between two successive crests.

c) the rate at which the wave moves thr ough the — The textbook states: Wave speed : It is the rate at which the wave moves thr ough the water , and is measured in knots.

b) the number of waves passing a given point dur — The textbook states: Wave frequency : It is the number of waves passing a given point during a onesecond time interval.

a) called a tide — The textbook states: TIDES The periodical rise and fall of the sea level, once or twice a day, mainly due to the attraction of the sun and the moon, is called a tide .

d) called surges — The textbook states: Movement of water caused by meteorological effects (winds and atmospheric pressure changes) are called surges.

c) very complex — The textbook states: The study of tides is very complex, spatially and temporally, as it has great variations in frequency, magnitude and height.

b) the major causes for the occurrence of tides — The textbook states: The moon’s gravitational pull to a great extent and to a lesser extent the sun’s gravitational pull, are the major causes for the occurrence of tides.

a) centrifugal force — The textbook states: Another factor is centrifugal force, which is the force that acts to counter balance the gravity.

d) responsible for creating the two major tidal — The textbook states: Together, the gravitational pull and the centrifugal force are responsible for creating the two major tidal bulges on the earth.

c) the difference between these two forces — The textbook states: The ‘tide-generating’ force is the difference between these two forces; i.e.

b) and the centrifugal force — The textbook states: the gravitational attraction of the moon and the centrifugal force.

a) greater than the centrifugal force — The textbook states: On the surface of the earth, nearest the moon, pull or the attractive force of the moon is greater than the centrifugal force, and so there is a net force causing a bulge towards the moon.

d) less — The textbook states: On the opposite side of the earth, the attractive force is less, as it is farther away from the moon, the centrifugal force is dominant.

c) away from the moon — The textbook states: It creates the second bulge away from the moon.

b) more important than the vertical forces in ge — The textbook states: On the surface of the earth, the horizontal tide generating forces are more important than the vertical forces in generating the tidal bulges.

a) islands they become low — The textbook states: When tidal bulges hit the mid-oceanic islands they become low.

d) the intensity of tides — The textbook states: The shape of bays and estuaries along a coastline can also magnify the intensity of tides.

The horizontal motion refers to the ocean currents and waves. Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water. Water moves ahead from one place to another through ocean currents while the water in the waves does not move, but the wave trains move ahead.

The horizontal motion refers to the ocean currents and waves. Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water. Wind causes waves to travel in the ocean and the energy is released on shorelines.

TIDES The periodical rise and fall of the sea level, once or twice a day, mainly due to the attraction of the sun and the moon, is called a tide . The study of tides is very complex, spatially and temporally, as it has great variations in frequency, magnitude and height. The moon’s gravitational pull to a great extent and to a lesser extent the sun’s gravitational pull, are the major causes for the occurrence of tides.

Most of the waves are caused by the wind driving against water. TIDES The periodical rise and fall of the sea level, once or twice a day, mainly due to the attraction of the sun and the moon, is called a tide . Importance of Tides Since tides are caused by the earth-moon-sun positions which are known accurately, the tides can be predicted well in advance.

TIDES The periodical rise and fall of the sea level, once or twice a day, mainly due to the attraction of the sun and the moon, is called a tide . The study of tides is very complex, spatially and temporally, as it has great variations in frequency, magnitude and height. The moon’s gravitational pull to a great extent and to a lesser extent the sun’s gravitational pull, are the major causes for the occurrence of tides.

MOVEMENTS OF OCEAN WATER T he ocean water is dynamic.

Its physical characteristics like temperature, salinity, density and the external forces like of the sun, moon and the winds influence the movement of ocean water.

The horizontal and vertical motions are common in ocean water bodies.

The horizontal motion refers to the ocean currents and waves.

Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water.

Water moves ahead from one place to another through ocean currents while the water in the waves does not move, but the wave trains move ahead.

The vertical motion refers to the rise and fall of water in the oceans and seas.

Due to attraction of the sun and the moon, the ocean water is raised up and falls down twice a day.

The upwelling of cold water from subsurface and the sinking of surface water are also forms of vertical motion of ocean water.

WAVES Waves are actually the ener gy, not the water as such, which moves across the ocean surface.

Water particles only travel in a small circle as a wave passes.

Wind causes waves to travel in the ocean and the energy is released on shorelines.

The motion of the surface water seldom affects the stagnant deep bottom water of the oceans.

As a wave approaches the beach, it slows down.

This is due to the friction occurring between the dynamic water and the sea floor.

And, when the depth of water is less than half the wavelength of the wave, the wave breaks.

The largest waves are found in the open oceans.

Waves continue to gr ow larger as they move and absorb energy from the wind.

Most of the waves are caused by the wind driving against water.

When a br eeze of two knots or less blows over calm water , small ripples form and grow as the wind speed increases until white caps appear in the breaking waves.

Its physical characteristics like temperature, salinity, density and the external forces like of the sun, moon and the winds influence the movement of ocean water. The horizontal motion refers to the ocean currents and waves. Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water. Water moves ahead from one place to another through ocean currents while the water in the waves does not move, but the wave trains move ahead. When the tide is channelled between islands or into bays and estuaries they are called tidal currents. OCEAN CURRENTS Ocean currents are like river flow in oceans. Ocean currents can also be classified based on temperature : as cold currents and warm currents: (i) cold currents bring cold water into warm water areas.

The horizontal motion refers to the ocean currents and waves. Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water. Water moves ahead from one place to another through ocean currents while the water in the waves does not move, but the wave trains move ahead. Wind causes waves to travel in the ocean and the energy is released on shorelines. The moon’s gravitational pull to a great extent and to a lesser extent the sun’s gravitational pull, are the major causes for the occurrence of tides. When the tide is channelled between islands or into bays and estuaries they are called tidal currents. OCEAN CURRENTS Ocean currents are like river flow in oceans.

MOVEMENTS OF OCEAN WATER T he ocean water is dynamic. MOVEMENTS OF OCEAN WATER T he ocean water is dynamic. Its physical characteristics like temperature, salinity, density and the external forces like of the sun, moon and the winds influence the movement of ocean water. The horizontal and vertical motions are common in ocean water bodies.

Its physical characteristics like temperature, salinity, density and the external forces like of the sun, moon and the winds influence the movement of ocean water. MOVEMENTS OF OCEAN WATER T he ocean water is dynamic. Its physical characteristics like temperature, salinity, density and the external forces like of the sun, moon and the winds influence the movement of ocean water. The horizontal and vertical motions are common in ocean water bodies. The horizontal motion refers to the ocean currents and waves.

The horizontal and vertical motions are common in ocean water bodies. Its physical characteristics like temperature, salinity, density and the external forces like of the sun, moon and the winds influence the movement of ocean water. The horizontal and vertical motions are common in ocean water bodies. The horizontal motion refers to the ocean currents and waves. Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water.

The horizontal motion refers to the ocean currents and waves. The horizontal and vertical motions are common in ocean water bodies. The horizontal motion refers to the ocean currents and waves. Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water. Water moves ahead from one place to another through ocean currents while the water in the waves does not move, but the wave trains move ahead.

Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water. The horizontal motion refers to the ocean currents and waves. Ocean currents are the continuous flow of huge amount of water in a definite direction while the waves are the horizontal motion of water. Water moves ahead from one place to another through ocean currents while the water in the waves does not move, but the wave trains move ahead. The vertical motion refers to the rise and fall of water in the oceans and seas.