Worksheet: Movements of Ocean Water | Geography Class 11 - Humanities/Arts PDF Download

Fill in the Blanks

Q1: The continuous flow of water in a definite direction is known as _______________.

Q2: Waves are primarily generated by the energy from the _______________.

Q3: The rise and fall of ocean water, mainly due to the attraction of the sun and moon, is called _______________.

Q4: The force that counteracts gravity in the formation of tidal bulges is known as _______________.

Q5: The highest tides in the world occur in the _______________.

Q6: Tides that occur twice a month when the sun, moon, and Earth are in a straight line are called _______________.

Q7: The force responsible for moving ocean water to the right in the northern hemisphere is the _______________.

Q8: Ocean currents influenced by heating by solar energy are caused by the expansion of _______________.

Q9: Surface currents constitute about _______________ of all the water in the ocean.

Q10: The mixing of warm and cold currents in the ocean helps to favor the growth of _______________.

Assertion and Reason Based

Q1: Assertion: Tides are caused by the gravitational forces between the Earth, Moon, and Sun.
Reason: Tides occur due to the combined effects of the gravitational pull of these celestial bodies and the rotation of the Earth.
(a) Both Assertion and Reason are true, and Reason is the correct explanation of the Assertion.
(b) Both Assertion and Reason are true, but Reason is not the correct explanation of the Assertion.
(c) Assertion is true, but Reason is false.
(d) Both Assertion and Reason are false.

Q2: Assertion: Waves are caused by the horizontal motion of ocean water.
Reason: The energy that drives waves is provided by the wind.
(a) Both Assertion and Reason are true, and Reason is the correct explanation of the Assertion.
(b) Both Assertion and Reason are true, but Reason is not the correct explanation of the Assertion.
(c) Assertion is true, but Reason is false.
(d) Both Assertion and Reason are false.

Q3: Assertion: Tidal bulges are higher on wide continental shelves.
Reason: The shape of bays and estuaries can greatly change tidal magnitudes.
(a) Both Assertion and Reason are true, and Reason is the correct explanation of the Assertion.
(b) Both Assertion and Reason are true, but Reason is not the correct explanation of the Assertion.
(c) Assertion is true, but Reason is false.
(d) Both Assertion and Reason are false.

Q4: Assertion: Warm currents bring warm water into cold water areas.
Reason: Warm currents are usually found on the east coast of continents in the high latitudes in the Northern Hemisphere.
(a) Both Assertion and Reason are true, and Reason is the correct explanation of the Assertion.
(b) Both Assertion and Reason are true, but Reason is not the correct explanation of the Assertion.
(c) Assertion is true, but Reason is false.
(d) Both Assertion and Reason are false.

Q5: Assertion: The Coriolis force causes ocean currents to move to the right in the northern hemisphere.
Reason: The Coriolis force is a primary force that initiates the movement of ocean currents.
(a) Both Assertion and Reason are true, and Reason is the correct explanation of the Assertion.
(b) Both Assertion and Reason are true, but Reason is not the correct explanation of the Assertion.
(c) Assertion is true, but Reason is false.
(d) Both Assertion and Reason are false.

Very Short Answer Type Questions

Q1: Define ocean currents.

Q2: What causes the slowing down of waves as they approach a beach?

Q3: What are tidal currents?

Q4: Explain the term "spring tides."

Q5: How does the moon's position affect tide height?

Q6: What are cold currents, and where are they usually found?

Q7: How do warm currents influence the climate of coastal regions?

Q8: Name the primary forces that influence ocean currents.

Q9: What is drift when referring to ocean currents?

Q10: What percentage of the ocean is made up of surface currents?

Short Answer Type Questions

Q1: Explain the relationship between the sun and the moon and the occurrence of tides.

Q2: Describe the characteristics of ocean waves, including wave height, amplitude, and wavelength.

Q3: Differentiate between semi-diurnal tide, diurnal tide, and mixed tide.

Q4: Discuss the effects of ocean currents on the climate of west coasts of continents in tropical and subtropical latitudes.

Long Answer Type Questions

Q1: Discuss the factors that contribute to the formation and characteristics of ocean waves. Include the role of wind, wave speed, and wave size.

Q2: Explain in detail the causes of tides, including the roles of the moon, the sun, and the Earth's rotation. Discuss the different types of tides.

Q3: Describe the significance of ocean currents in terms of their impact on climate, marine life, and navigation. Use specific examples to illustrate your points.

Q4: Analyze the role of the Coriolis force in shaping ocean currents and its influence on the movement of warm and cold currents in the world's oceans.